ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Measurements using compact tension specimens machined from compression and injectionmolded plaques of polyoxymethylene show a systematic decrease in the plane-strain critical stress intensity KIC for crack initiation with crystallization temperature and with molecular weight, but little change in the yield stress in plane strain compression tests. The variation in KIC with crystallization temperature has been accounted for in terms of the effective entanglement density in the damage zone ahead of the crack tip. The entanglement density is argued to decrease with increasing temperature owing to partial disentanglement of the polymer chains during lamellar folding. © 1995 John Wiley & Sons, Inc.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1995.070550314
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