Thermodynamics and hydrodynamics of gels - Journal de Physique II

1 downloads 0 Views 889KB Size Report
Thermodynamics and hydrodynamics of chemical gels. K: Sekimoto'. Defiartment of. Applied Physics, Nagoya. University,. Nagoya 464, Japan. (Repu le 5 juin ...
Phys.

J.

(1991)

II1

19~36

1991,

JANVIER

19

PAGE

Classification

Physics

Abstracts

82.70G

62.20

05.70L

/

Thermodynamics

hydrodynamics

and

of

gels

chemical

Sekimoto'

K:

Defiartment (Repu

of

juin

le 5

Applied

Physics,

idvisd

1990,

le 3

Nagoya

University,

sepiemhre

accepid

1990,

464,

Nagoya le 16

Japan

octohre

1990)

Abstract. have developed'a framework We of thermodynamics hydrodynamics of and chemically crosslinked framework of thermodynamics is analogous to that of binary gels. Our fluid mixtures, except that the former includes a variable describing the deformation of the solid (network) of gels. -The< framework portion of the hydrodynamics is based on the theory of hydrodynamics of systems with broken symmetry and on the assumption of local equilibrium. Inthe framework there is no plastic flow of solid portions of gels, an that present assume we assumption which leads to the identification field with the displacements of the order-parameter of the material composini the §olid portion. We also investigated the properties of the symmetry Olisager coeffiiients fir this system with an emphasis ok the relation to the metric tensor the'defirmation of the solid portion of iels. We investigated the limit of incompressib(describing lity'of both'the solid and the fluid portion of gels, as well as some other special cases of isotropic processes and the states with quasi~mechanical equilibribm. Our deformations, isothermal framework deformed introduces the presents a generalization of Darcy's law to the systems and osmotic

1.

.Introducdon.

Gels

are

properly.

reactions the

of

part

[i~crystals

gels there

through. the gel, plastic

important

bulk

call

Another,

of in

network

in

gels

and

of

gels

feature

gel

occurs

chemical

chemical

which

would

portion slowly than more gels usually occurs

of the

solid

gels simply gels

in

this

atoms

features

the

paper.

[2, 3], or colloidal distinguish them

their is

that

purely in

crystals [4] from

mechanical

those

gels) applicability

the

gels

made

deformation

of the

,

media

Porous

linear

other

modeling through of the

elasticity

if we allowed thq brea$ up and the Although the perrneatioi of solvents in the propagation of the acoustic waves slowly than permeation does. We more

occur

of gels. still

which

irreversible the

boun(.

without

move

interstitial

with

(so-called the chemical gels or the gel can become very large beyond

of the flow

can

however,

are,

plastic flows, the flow

without

reconnection

hereafter

gas

,

efficts, often are restricted jpplicability.

rather

theory

or

In

particles

which-§olvent

Thermal

chemical solid

,.

through fluid

with

this

systems has


identifies

three

a~ (pu~ )

(Ff

F(

k~

w

~Ji~

(3.I1)

0 ,

k)j

J

ax~

(3,12) ,

+ab~~~-~a~a,

+

Hi

Uf

Pi

(3,13)

r

~

identity is given in

PeV~

~t

local

+1~r a~vP

8~) +

RI,

(3.14>

where

have

we

(Ff

m

(Ff

il m

obtaining

second

the

line

decompose ((«~°~)$) by introducing

(3,15)

of

the

we

F(

V

have

we

following

)(T~~

V

(3,15)

Tf)

currents

mass

the

F(

k~

(T~ 8~~

=

Now

M

II.

defined 8~

In

PHYSIQUE

JOURNAL'DE

26

k~

(T~f

) a~

V

used

formula

(2.7).

p~&

and

piui

(3.16)

and

the

momentum

current

quantities,

it m

jr «

(~'~)S "

P

f(uf

)

(3. ii)

v)

(3.ig)

v

p~(x

Tf

(~'~~~JS

(3.19)

(or &) and ((tr~°~)$) in (3.14) using (3.17)-(3.19). As in the case of jf + j$ vanishes identically due [20] the sum of the diffusive currents definitions (3.7), (3.8), (3.17) and (3,18). Below, however, these diffusive to currents are treated separately, just as they were treated in the case of the binary fluid mixtures, since by doing so the results the symmetric forms which thdrefore would be easily possess more generalizable for the gels with multi-component In the resulting equation we solvents. substitute (2.ll) and (2.12), the latter being here interpreted under local equilibrium a assumption as

We the

eliminate

binary

pi ui,

fluid

p~

mixtures

0

We

now

define

dissipative

the

j thus

obtain

the

JE

aAMi

p~ aA

+

if

current

Hi

~v

2 a~

+

(T~f.

~MfJf

o

~~

~MmJm

(3.20)

as

~~

T))

J#~

Pm

(ji~

following a

pi

entropy

D~

"p

=

+

(T$ 8~~

l

~~

JS

We

aAr

ps

=

(ps)

~

fji~

(#m1

~

~

Pm

ji~j

(3.21)

v

equation,

a~(psv~

=

at

M

+

js~ ~)

a~r

~ js~

r

a~mi

~Jf

~ ~

a~MS ~

'

+

Aj'+ A~,

~ jm~

+

i~V~ (« ~ )S ~ (3.22)

M

THERMODYNAMICS

I

where

HYDRODYNAMICS

AND

OF

CHEMICAL

GELS

27

have

we

I

Aj

m

(-

a~Tf

f VU

=

T

+

(Ff a~ (T~fj

~J-

T$ a ~ aXP

a yP

ax"

0

~

~2

(3.23)

=

[

F( j#~)

(F~J/~~

"

ax

~'

[JT)

I

J tr T8

Jp~

r

l

evaluatiig

description

AI

used

we

ax

j

D~

(3.24)

~

~

(2.7) and

(A.7)).'In transforrhing

below

~

J#~

~

~

~

Pm

rdlation

the

~

~

,,

I tr T

l'T

T

In

JT)

(aliXP)(J aXP/ ax")

identity

the

expreision

the

of A~

have

we

0 =

(see

introduced

derivative,

covariant

Af,~ma~Af+Ff~A)-F)~Af, where

symbol F(~ is

Christofel's

defined

F(A

'~

and-

we

have

appendix and

entropy

the

used C.

that

Jp~ is

all of

these

fact

Gathering

expresjion

the

of

the

a

~~~~

entropy

3~T,,

jJs

(3.26)

ax

ax

(see (2.14)), The derivation of (3.24) is given finally obtain the equation of the balance of production as follows

constant

together

we

3~(psu~

=

"

~~j,

m

( (Ps) fbs

(3.25)

as

ax

in

3~ u~

+'j

~ ~

j

~~~ji~

+

I'

#m

~

j?~)

latter

respectively,

expression are

shows

that

dissipative

the

if, if, j$

=

PS

3vT

+

)$ ~

1

~

~,

contain not

so

this

(he

relation

we

covariant

Pi

surprising

:

reexpress The

can

derivative. When

the

ji~

(3.28)

A

tr~

defined in (3.21), (3,17), (3,18) and (3.19), corresponding "currents. In the next section we relating these dissipative with the local thercurrents that the variant of the Gibbs-Duhem relation (3.20) can be and

as

3vMi+

follows, Pm

'#m

T

I

+

Pm

Using

(3.27)

of the

parts

discuss the Onsager coefficients modynamic forces. We note here rewritten using the covariant derivative

°

Is

+

m

The

the

the

the

right

appearance deforrnation of

:hand

side

of the

gel

is

of

(3.28) in

covariant not

(3.29)

T), A

v;A

a

derivative

homogeneous,

form

in the

that

does

(3.24)-(3.29) inverse

of

not

is the

mapping On

X

x(X)

-

other

the

defines

hand

it is

curved

the

easy

that

means

-component

(~P At-

as

the

derivative

of A

expressed by of

-component

~'"

3x~

respect

the

the

to

curved

3x~

3x~

3xP

3x~

tr-th

coordinate

the

reference

coordinate,

curved

X-coordinate

Cartesian

the

x~, x~) in that

has

system Thus

system.

a

lax",

of

the

representation

the

that

say

can

we

space.

the

v

derivatives

covariant in

derivative case

3xP

with

the

(~

~

~

and

~~

~~

M

II

(xi, (3.25)

system

(3.24)

from

3x~ 3x~

3

? This

coordinate

verify

to

PHYSIQUE

DE

JOURNAL

28

of

first

the

gels the last since

terra

spatial

of

two

variation

space

terrns

spatial

the of

quantities

the

reference

on

is

mbre

appear natural

the

right

hand

therrnodynamic

other

side

of

in

real

as

TIP

+

p~

V~

k

)

where

8~~

is the

Kronecker

a~ipv~

delta.

Here

the

as

the

as

the

forrnalism

should

be

conservation

mass

converted

:

(3.30)

0 =

(~rt°t>~v

vv

as as

densities, (2.17), is

constraint have dynamical (3.30) used (3.2) and (3.3). The we constraint introduce component) constraint. order to satisfy this In we motion field [21] which is generated (3.4) the constraining force mixtures fi, as is the case for binary fluid

=

important important

the

in

~,

where

a,(pvv)

that

etc.

above

the

a~ (pi Vi uf

space.

generally are a~XPlax~ ax~, is

which

of add

We

(3.25)

describe how the remaining part of this section we the mass constraint modified in the incompressible The on case. variables using the equations of into that on the dynamical In

quantities

those

the

distortion, quantities such

of the

variation

for

when than

(tr~°~)~~ is in fact

+

not

is

a

(or equation

scalar

in

the

by

a

scalar

the

of

field

(3.31)

iii ~v

one-

,

total

stress

since it

excludes

the the incompressibility of the constituents. Next the relation of local equilibrium (3.10) is modified following the recipe given in (2.21). We then identify fl with p since the latter has been introduced incompressibility constraint. The to satisfy the derivation of the expression of the production tbs is completely in parallel with that entropy given in the compressible case, except for replacements according to (2.21). We obtain in place of (3.28) and (3.29) the following equations

contribution

yields

that

4s

a~r

jjs~

~

m

a~vv +



~

3~(vf+ Pip) Jf

i

~~

p

~

0

Ps 3 vT +

=

#m +

Pm

Pi

)S

3v(vi

+

~/ +

T

Mm I

j

+

+

~

VmPi

A

~ Jm~

(3.32)

Pip) ~mP~

A

P~ )~,

(3.33)

derivative in (3.32) by using (3.33). As noted in the again we can eliminate the covariant of section including (2.22), if the therrnodynamic potential is given as a paragraph 3 last therrnodynamic variables of the incompressible systems (see (2.18)), function of independent Here

M

THERMODYNAMICS

I

HYDRODYNAMICS

AND

CHEMICAL

OF

GELS

29

have to (3.32) and (3.33) into those modified for such a case by applying the convert replacements (2.19) to equations (3.32) and (3.33).,In this case the Lagrange multiplier field p( fl), which has been introduced merely for generating the constraining force, has the real meaning of a field. (2,18) the From reversible of the H parts stress, pressure or we

=

H~,

calculated

are

volume,

Onsager

4. We

the

contribution

no

relations

linear

and

within

derivatives

have

restricted

of the

space

bulk

the

to

states

with

constant

pressure.

coefficients.

assume

gels,

the

as

therefore

and

we

thermodynamic coefficients L~~f

the

between

Onsager

the

introduce-

forces

and

and

Af/

the

irreversible

through

the

fluxes

in

following

equations

ji~

L,,hsfl

(tr~)t therrnodynamic

the

f(

forces

defined

are

f]

(4.i)

m

(4.2)

as

) ~

w

f/

(4.3) (4.4)

w

~#~l-

f(w-

or

=

All

(4. 16) ,

we

have

the

following

relations

Ajabi,p Bj(~ Bj(~

=

=

Bj(~ B((~

"

p, q p, q

(4.17)

Ajbai,p =

=

0, 0,

or

or

2

(4,18)

2.

(4.19)

M

THERMODYNAMICS

I

Since in this

paper

assume

we

can

the

following

do

we

that

the

allow

not

vorticity

internal,

for

the

v

does

A

ff (h )

rot

or

couple

not

GELS

CHEMICAL

degrees of freedom,

intrinsic

rotational

with

dissipative

any

31

flux.

implies

This

relation A

fj (h

(4. 20)

=

which

OF

HYDRODYNAMICS

AND

,

implies

~jj)

Bjj) ~

Bj(~

=

(4.18), (4,19)

From

(4,21)

and

Ari(h)

we

obtain

( ( ( (

+

where

introduced

have

we

expression

above

for

+

the

Afi(h),

components

(h~>~v(hP>~«i

Bj(~[(hP)(h~)]~~~~,

(4.22)

notation

[~'~)(Q))~vA« The

expression

the

(4.21)

2.

q-o

2p=oq=o

the

or

=

Bll~i(hP>~v(h~)~«

=

p=o

0,

p, q

~~A Qua

"

the

assures

+

~~«

QVA

+

Af/(h)

symmetry

folliwing relatioi,

~v« Q~A

=

A([(h),

+

Q~a.

~vA from

(~.~~)

which

we

(tr~)1.

(tr~)S

have

the

(4.24)

=

Concluding

5.

remarks.

therrnodynamics and hydrodynamics of gels both in framework described the of the describe how the this section In compressible and in the incompressible we cases, faIniliar reduced into sections forrnulae for incompressible gels given in the previous more are isothermal such as that of forms when we consider certain special cases process or of isotropic

We

have

the

and

deformation

on.

so

therrnodynamics in which we did not introdqce the Lagrange multiplier (see (2,18), (2,19) and the paragraph including these equations) it is very H H becomes WI, and w deformation. The the case of isotropic consider tensor easy to for isothermal have Especially of gel. identified with the osmotic be processes we pressure can relation, familiar the following the

In

first

type

forrnulation

of

of

=

d(E

longer

We

no

we

discuss

(dr (2,21)

0

),

discuss

the

the

second

above

becomes

d

(E

TS)

(~

.n~~~

w

=

(5,1)

dV

since its hydrodynamic counterpart is lacking. Next isotherrnal using the Lagrange multiplier. In the processes version of (2.4) obtained by applying the replacements given in of (dM~ 0) as follows amount monomers fornlalism

forrnalism

incompressible for a given

the

=

rS)

=

M M~

fixed

~

(M f

+

VfP ) d @

+

? [T~

JpF~

'

]( dF(

(5.2)

dM~

of

Because

and

0

PHYSIQUE

DE

JOURNAL

32

incompressibility

the

=

dmi

constraint-

have

we

M~

VI

=

M

II

(5.3)

dJ.

~

Pm

Using (5.3), (2.14)

(2,15)

and

d(E

view

In

(2.7)

of

M~

fixed

find

we

~

be

identified

as

notation

same

replacement

osmotic

as

stress

by (2.21),

isotropic

a

fact

deforrnation

of

VI

T +

which

incompressible gel, Note

with

Ml)

and

reduced

thus

is

stress

physical

our

further

Vi (vf

"

this

that

agrees

gel (5.5) is

WI

(5.5)

vi1

of the

(2.19).

in

(5.4)

vi

tensor

tensor

introduced

that

described

For

pressure.

the

ldfi

JF~

+

~

the

that

m

can

f

T~

~

H

the

as

~

TS)

(5.4)

and

(5.2)

rewrite

we

have

we

invariant

intuition of relation the

to

used

under

the

osmotic

(~'~~

1 ,

where

have

we

defined

incompressible subtracted.

As

it)

if (= Especially

from

solvent for

VI M/I.

Tm-

which

the

Ml

Here

from

potential

chemical

the

is

contribution

'

constraining

the

hydrodynamics the incompressible version of the by applying the replacements given in (2.21) isotherrnal dr 0, using (3.33) we obtain processes,

obtained

is

for

the

of

force

relation

linear to

pure

a

properly

is

(4.4)

for

(4.5).

and

=

ji ~

Lu(

p~

the

other

hand

mechanical

equilibrium

motion

of =

within

3~iPV~

of

center

mass

(3.31)

is

now

given

(«~)ti

Tt +P8

V~

(5.7)

T

as

(5.8)

~v

gel

the

is have

we

the

the

rapidly,

very

of

and

center

mass

condition

as

is the

tr~,

mechanical

of

a~(Tf -p8~v)

=

have

reached

velocity

the

0

we

local

of the

pi )[

a~(T

Vi~) Pm

neglect in (5.8) the terrns containing velocity gradient (see (4.2)). Then

Substituting (5.9) into (5.7) (nonisotropic) ge[s,

Li~( +

T

equation

the

3 If

(Hi

aA

=

Pm

On

Li~(

Pi

~

case

which

isually, is

driven

we

can

by

the

balance

(5.9)

following expression

for

Darcy's law of perrneation in

the

Vf(pm Lff~ jf

~fm~ )

Pi

~A(Mf

~~ "

Pm

Vi (P

+

~fP)

~

Lffl

P

m =

~

f

L furl

~~

~ «

A

(5. 10)

M

THERMODYNAMICS

I

where

H

defined

was

using

rewritten

(5.5).

in

derivatives

HYDRODYNAMICS

AND

We

with

add

j

This

formula

useful

is

for

submitting

After

the

first

33

B

tensor

BY

[JK

be

can

following

XP in the

way

:

(5,I I)

aXP

of the

calculation

the

GELS

arbitrary

an

coordinates

reference ~

=

divergence of

the

the

to

a~B[

(XP).

that

here

respect

CHEMICAL

OF

version

of the

using

models

the M.

present

reference

coordinate

informed

Doi

paper isotherrnal the

the

system author of

in which other things he studies slow perrneation of gels among incompressibility assumption. His results agree with (5.9) and (5.10) if we apply to these transforrnation equations a according to recipe (2,19) (see the discussion in the last paragraph of section 3).

his

[23]

paper

under

the

Acknowledgments. acknowledges

author

The

for his

valuable

and

Appendix A. homogeneous

A

author

The

comments.

publication,

to

Kawakatsu

T.

Maggs

A.

of

relation

in

Doi

M.

for

his

the

referee

work

prior

manuscript.

the

thermodynamics

the

thanks

also

He

communicating

binary

of

gels

under

isotropic

and

mixtures.

fluid

of gels. (Here the adjective homogeneous is in fact isotropic and non-homogeneous gels we realize cannot an deformation constraint.) The isotropic such that under the coherency deforrnation is defined J~'~ I with J VI (p[ M~), where V is the volume in the real sjace occupied by the gel F reference sample and pi M~ is its corresponding volume. If we regard the gel in this state as introduce the the binary fluid mixture of the and the it is natural solvent to monomers, consider

We

superfluous

the

since

=

isotropic

to

discussions.

fruitful thanks

reading

for

description

brief

deformations

for also

in

deforrnation

chemical

=

entropy

$~~

as

a

$~~(E, Mi, M~,

To

the

see

chemical

correspondence potentials and

easy

to

show

that

V

)

S =

V,

and

(E,

which

Mi, M~,

defined

is

v

F

m

Pm,

as

ij3

(Al)

l

Mm

ofbinary fluid mixtures we introduce therrnodynamics the through the following equation : hydrostatic pressure

with the

dS,~~

It is

Mi, M~

of E,

function

we

m

can

T

=

dE

b dmi

identify

vi in>

pi,

T

d dM~ (b2)

with

Pm ,

=

v

~ m

p

Mm

(A2)

p d V

defined

that

v

~ =

Pm

+

2j3

pi

the

in

the

text

and

that

(A3)

(A4)

Appendix

Derivation

B.

introduce

We

of

derivative

time

:

$ DA

W

(Bl)

at

~

3A

(X, t)

~~

~~'

at

~

m

~~

~~

V

+

at

(82)

3x~

have

we

Using

(x, t)

aA

aA

Thus

M

II

(3.12).

of

kinds

two

PHYSIQUE

DE

JOURNAL

34

following

the

a

F(

fi

J

D

F(

Dt

J

3

F(

ax~

J

~

~'

~~~~

relations

$

j

(84)

"

DJ

aXPa

ax~

%

ax~ fi

$

aXP

ak~

ax~

aXP

~

J

=

rewrite

can

we

(83)

~~~ ax~

(85) ,

as

~~

3

lk_ =

J

at

JaXP

~

l

ax~

J

F~gA) P

=~(iff-~F(j-V~P~, where

we

defined

have

~ ~P~

Since we

~P~

obtain

Appendix For

the

can

be

directly

shown

expression (3.12)

C.

(86)

J

J

ax~

Derivation

simplicity

of

of

in

to

the

m

vanish,

ax~

F)

(87)

J

which is

essentially

the

identity d(da

A

dh

m

o

[22],

text.

(3.24). the

equations

we

temporarily

introduce

a

vector

y

defined

as

M

THERMODYNAMICS

I

y~

(rJpn~)- j#~.

m

first

line

~~~~

JT] lY~ r(A

Y~

y~ (a~(JT))

=

y

=

(J7j

v

the

second

~~~

a~~~~ ~

r(A

+ Y

right

the

on

GELS

CHEMICAL

side

hand

(3.24)

of

35

derived

is

from

the

(JT])

~

y

~

~

Y

~

~~ ~~ ~~~~

~~~~

~~~~

~

F)~ JTf)

F(~ JT$

+

line

OF

:

~~~~

~~

"

follows

as

Then

HYDRODYNAMICS

AND

(JT$)

a~(JT~)

~

JT~ ))

(ci) ~

This

.leads

to

hand

side

of

the required expression in (3.24) we only need to use

JPm

~~~~~ ~'

In proceeding following relation

the

text.

the

arbitrary

an

Appendix D.

key

The

Derivation

identities

where

A,

tensor

(4,10)

of we

~~~~

the

used

following

the

to

L~bf(h)

are

and

defined

(D2)

of

Aff(h)

antisymmetric tensor L~~f(h ) and Ail (h)

can

dressed

lines

like

be

Ii

=

8p~

[16],

formula

I~1)~~ E~~~

h +

8

8

flu

yv

the

metric

expressed

the

and

as

three-point (bare) (h~)~y whose both

(D2) (D3)

8 yv

the

h~p.

tensor

diagram in

bounded

are

line

text

and

the

E~ p~

the

assume

the

of

terra

of

we

8~p,

delta

h~ p

Generically

vertices.

ends

Each

which

second

the

are

that

completely

expansion of represented,

these

graphs

by three-point

vertices

of

some

right

posess in the

way,

QIS~>

terms

~h~

(4.12)-(4.14) in the text. In going to already used (Dl). As noted in Kronecker expanded only by using the

E~p~ and

Using

~)aA ~A~v

in

are

two-

following

constant.

a

(Dl)

have

we

respectively, by internal

is

=0,

~3(~ ~

E«py E«~v

side

pi

=

;

"

hand

Jp~

Cayley-Hamilton

the

are

use

~afly ~fl~ ~yv

(, I~ and I~

A

that

fact

h~-Iih~+I~h-I~l and

right

(4.ll),

and

going

are

have

we

the

on

'

Pm

;

for

line

:

AS

lJAf PI

~

third

the

to

formulae which

do

(Dl-3) not

we

include

show

below

three-point

m

~«py(h~)yy

that

a

bare

quantity vertices

(D4)

~y«> like :

Qj$jj

From

(Dl)

can we

be

decomposed into the following

have

identity, 1=

(h~-Iih+I~l)h. /3

(D5)

Applying

identity

this

I

Qjj~p

Qt)&1

formula

Ij

~h~

h

Ii

to

I~

h +

i

yj

(h~ )~~

E~ p~

+121>~ja~ I(h~

~

(hn>~ ~

(h~)~y

II

on

~ ~

right

hand

pa

~~«f

~&if

+12 iYl

h

[~h~-Iih+I~l)~]~~ [(h~-

vertices,

pairs

the

terms

and

eliminate lead

to

(8~j8~j-8~j

(D6)

we

8~~),

have

(D7)

to

of

the

second

three-point

equation bare

have

we

vertices

used

connected

the

by

formula any

(D3). number

In of

this bare

way

we

can

two-point

bare three-point in each of the topologically is at most only one vertex topologically joined graphs with a single external leg, which correspond to Thus for vanish since h is a symmetric like E~p~(h~)p~, do, however, tensor. Ail we can eliminate all the three-point bare vertices. In each term thus obtained we Cayley-Hamilton formula, and then we are the higher powers of h's by using the

until

joined graphs. L~~f

side of

Ii

where, in going eliminate

h+I~l)~]p~

Ii

(D6>

p~(hn>~~ ~~a~

the

13 =

M

II

obtain

we

~

(D2) n-timis

~ ~

(D4)

(h2

Ii

=

Employing

in

n-times

PHYSIQUE

DE

JOURNAL

36

there

The

expressions

(4,12)

and

(4.13) in

the

text.

References

[1] BIOT M. A. and WILLIS D. G., J. Appl. Mech. 24 (1957) 594. [2] ALEXANDER J. I. D. and JOHNSON W. C., J. Appl. Phys. 58 (1985) 816. J. I. D., J. Appl. Phys. 59 (1986) 2735. ALEXANDER [3] JOHNSON W. C. and DuBoIs-VIOLETTE E., PANSU B. and ROTHEN F., J. Phys. France 49 (1988) [4] JORAND M., [5] TANAKA T., HOCKER L. O. and BENEDEK G. B., J. Chem. Phys. 59 (1973) 5151.

ll19.

GENNES P. G., Macromolecules 9 (1976) 587 and 594. [~ TANAKA T., ISHIWATA S. and ISHIMOTO C., Phys. Rev. Lent. 38 (1977) 771. D., J. Chem. Phys. 70 (1979) 1214. FILLMORE [8] TANAKA T. and [9] LI Y. and TANAKA T., J. Chem. Phys. 92 (1990) 1365. [10] MATsuo E. S., TANAKA T., J. Chem. Phys. 90 (1989) 5161. [ll] GEISLLER E. and HECHT A. M., J. Chem. Phys. 77 (1982) 1548. [12] SEKIMOTO K., SUEMATSU Ni and KAWASAKI K., Phys. Rev. A 39 (1989) 4912. [13] TANAKA T., Phys. Rev. Lent. 40 (1978) 820. [14] JOHNSON D. L., J. Chem. Phys. 77 (1982) 1531. [15] ONUKI A., Dynamics of Ordering Processes in Condensed and H. Mater, Y. Komura Furukawa Eds. ~Plenurn, New York, 1988). [16] RIVLIN R. S., Rheology, F. Eirich Ed. (Academic Press, New York, London, 1956) vol.1. Statistical Physics, English Ed. (Pergamon, 1958). [17] LANDAU L. D. and LIFSHITz E. M., [18] MARTIN P. C., PARODI O. and PERSHAN P. S., Phys. Rev. A 6 (1972) 2401. [19] FLORY P. J., Principles of Polymer Chemistry (Comell Univ. Press, Ithaca, 1966) Chaps.12 and

[6] DE

13.

(McGraw-Hill, 1962). Thermodynamics j20] See, for example, D. D. Fitts, Nonequilibrium (Addison-Wesley Pub., 1950).p. 40. Mechanics, j21] GOLDSTEtN H., Classical Mathematical Physics, (Cambridge Univ. Methods of Geometrical j22] See, for example, B. F. Schutz, Press, 1980). j23] DOI M., Dynamics and Patterns in Complex Fluids, A. Onuki and K. Kawasaki Eds. (SpringerVerlag, 1990) to be published.