THERMOGRAVIMETRIC ANALYSIS OF ABLATIVE POLYMERS.

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Abstract:

Thermogravimetric analyses were performed on six samples of polymer ESR3560H, two samples of two-tone ablator, and two samples of polymer Y9089 3M Tape. Thermograms are presented for all samples, and semiempirical kinetic equations of the thermograms are presented for the polymer ESR3560H and the two-tone ablator. Polymer ESR3560H decomposed with an apparent third-order reaction rate n 3 and an apparent activation energy of E 54,700 calmol, while the two-tone ablator decomposed with n 2 and E 33,600 calmol. The decomposition of Y9089 3M Tape took place in two steps below 380 C the decomposition followed n 2 with E 12,000 calmol and above 380 C, n 3 with E 41,200 calmol. In addition, the polymer Y9089 3M Tape was investigated by calorimetry. Preliminary results showed that the depolymerization reaction for this polymer is slightly exothermic, and the heat of depolymerization is of the order of -50 or - 20 calg. Author

Author(s):
Chang, E. T. ; Poston, T. M. ; Gokcen, N. A.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CA EL SEGUNDO TECHNICAL OPERATIONS
Descriptive Note:
Technical documentary rept.,
Annotation:
Thermogravimetric analysis of ablative polymers.
Pagination:
0026

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TDR-669(6108-27)-2, SSD-TR-66-24
Contract/Grant Number(s):
AF 04(695)-669
Monitor Series:
TR-66-24
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*THERMOGRAVIMETRIC ANALYSIS, POLYMERS), REACTION KINETICS, CHEMICAL REACTIONS, HEAT RESISTANT MATERIALS, CALORIMETRY, ABLATION, FUNCTIONS(MATHEMATICS), NUMERICAL INTEGRATION, DECOMPOSITION, TAPES, ARGON, GASES
Field(s)/Group(s):
Physical Chemistry
Report Date:
1965 Jan 01