Transient Crystallization of an Aromatic Polyetherimide: Effect of Annealing

reportActive / Technical Report | Accession Number: ADA231988 | Open PDF

Abstract:

A systematic study using differential scanning calorimetry DSC has been performed on the annealing behavior of an aromatic polyethermide Ultem 5001. Although crystallization from the melt did not occur crystallinity was easily induced in the presence of methylene chloride. With annealing, a sharp melt endotherm of the solvent-treated polythermide was observed. The melt temperature determined after annealing for 30 minutes increased progressively as the annealing temperature increased leading after annealing for to an extrapolation to an apparent equilibrium melt temperature of 369 C. However, the melt temperature, as well as crystallinity, increased with the increase of the residence time at each annealing temperature.

Author(s):
Desper, C. R. ; Hsieh, Alex J. ; Schneider, Nathaniel S.
Author Organization(s):
ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
Descriptive Note:
Final rept.
Pagination:
0024

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MTL-TR-91-1
Project Number(s):
1L161102AH42
Monitor Series:
LABCOM
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.2_Understand; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1_Force Support; JCA_4.6_Engineering; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_1.2_Force Preparation
Modernization Areas:
Space
Communities of Interest:
Weapons Technologies
Descriptor(s):
*SCANNING, TEMPERATURE, ANNEALING, MELTS, SHARPNESS, EQUILIBRIUM(GENERAL), MELTING, CHLORIDES, METHYLENES, CALORIMETRY, TRANSIENTS, CRYSTALLIZATION
Field(s)/Group(s):
Organic Chemistry, Crystallography
Keyword(s):
*POLYTHERIMIDE, *CRYSTALLIZATION, *CRYSTAL STRUCTURE, ANNEALING, PHASE TRANSFORMATION, POLYMERS, PE61102A, ASH42
Report Date:
1991 Jan 01