High Temperature Composite Resins - Defense Technical ...

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19 Aug 2011 ... rules for thermosetting polymers. 15. SUBJECT TERMS. 16. SECURITY CLASSIFICATION OF: 17. LIMITATION. OF ABSTRACT. 18. NUMBER.
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1. REPORT DATE (DD-MM-YYYY)

2. REPORT TYPE

19-08-2011

Briefing Charts

3. DATES COVERED (From - To)

4. TITLE AND SUBTITLE

5a. CONTRACT NUMBER

High Temperature Composite Resins: Re-Writing the Rules for Thermosetting Polymers

5b. GRANT NUMBER

6. AUTHOR(S)

5d. PROJECT NUMBER

5c. PROGRAM ELEMENT NUMBER

Andrew Guenthner, Kevin R. Lamison, Josiah T. Reams, Vandana Vij, Gregory R. Yandek, Matthew C. Davis, Michael E. Wright, Lee R. Cambrea, and Joseph M..Mabry 5f. WORK UNIT NUMBER

23030521 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)

8. PERFORMING ORGANIZATION REPORT NUMBER

Air Force Research Laboratory (AFMC) AFRL/RZSM 9 Antares Road Edwards AFB CA 93524-7401

AFRL-RZ-ED-VG-2011-365

9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)

10. SPONSOR/MONITOR’S ACRONYM(S)

Air Force Research Laboratory (AFMC) AFRL/RZS 5 Pollux Drive Edwards AFB CA 93524-7048

11. SPONSOR/MONITOR’S NUMBER(S)

AFRL-RZ-ED-VG-2011-365

12. DISTRIBUTION / AVAILABILITY STATEMENT

Approved for public release; distribution unlimited (PA #11663).

13. SUPPLEMENTARY NOTES

For presentation at the SAMPE High Desert Conference, Palmdale, CA, 20 Sep 2011 14. ABSTRACT This is a presentation for the the SAMPE High Desert Conference, about high temperature composite resins and re-writing the rules for thermosetting polymers.

15. SUBJECT TERMS

16. SECURITY CLASSIFICATION OF:

17. LIMITATION OF ABSTRACT

18. NUMBER OF PAGES

19a. NAME OF RESPONSIBLE PERSON

Dr. Joseph M. Mabry a. REPORT

b. ABSTRACT

c. THIS PAGE

19b. TELEPHONE NUMBER

SAR Unclassified

Unclassified

Unclassified

22

(include area code)

N/A Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. 239.18

HIGH-TEMPERATURE COMPOSITE RI:SINS: RE-WRITING THE RULES FOR THERMOSETTING POLYMERS 20 September 2011

~ •••

Outline

• Unusual Structure-Property Relationships in High-

T9 Thermosetting Polymers

/ "'

- Cause: expansion of the diBenedetto envelope (i -o

..

"'
f Cyanate Esters Cured 12 h BADCy LECy SiMCy

134 142 152

168 183 186



Vitrification slows down conversion, but does not stop it completely



Under isothermal conditions, the rate of conversion will fall as conversion increases, but the sensitivity of T 9 to conversion will rise, resulting in a fairly constant rise in T 9



The greater the sensitivity, the further T 9 can rise above Tcure

246 21 3

DISTRIBUTION A : Approved for public release; distribution is unlimited

I

J ••

"Vitreous Cure" Changes the Rules of Network Formation Traditional Thermal Cure r-1

r

r-

r-



Cure results in:

• • •

J

• • •

J

~

[

• • •u .......

1

'-

"Vitreous Cure"





Net Shrinkage



Less permeability



Higher modulus



Brittleness

Cure results in:

• •

'





J

r



l-lirthar f'-'VI narrna!:lhil.if" I I I V U V I I I' LY

1 ll':;:jl l V I



Lower modulus



Toughness

J

"Vitreous Cure" is promoted by rigid network segments with well-distributed extensibility, and by curH temperatures that are low in comparison to T (though Tcure < T may not be a criterion) 9 9



Net Expansion

Both types of cure can happen sequentially, simultaneously, or in mixed form .

~J_i_

_.

DISTRIBUTION A : Approved for public release; distribution is unlimited

Evidence for "Vitreous Cure" in Cyanate Esters 1.24

BADCyonly

BADCyonly

:1:.

1.23

•S

;;-

!

"

:I

":1 40

1

.. ~

":: ...•

1.22

~ ~

=

Gl

'0

3 5·

1.21

.

"

~:eo

C.90

Georjon, 0 . and Galy, J. Polymer 1.28+ .80- --0...,.85 _ ____;.,_0.,.... 90---0.,.....Q5_ _ _1......~tJ2 1998, 39, 343

C.S5

FiJ:ttt'C' 2 Varialiun of the 18 1 Young's modulu-. and 1 1 ultrn~nntl muduJu., ·'"a functiom ofconver::,um 1uncatalyzl·d Ol'lwork- 1 \'anatlon of the Yuuni,., moduJu ... uf cnt.ll~ Zl'd Ol·twurk,.,.

conversion tl!!urt! J

Dcn"t)' '~lu