ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The feasibility of molecular imaging in polymers by electron microscopy is discussed. The tilted dark-field method is specifically chosen for studying ultramicrotome thin sections. One system studied here is bisphenol-A diglycidyl ether epoxide monomer (DGEBA) amine cured either by dicyandiamine or by diaminodiphenyl sulfone under various conditions. The second sample is a polyimide prepared from maleic anhydride and diaminophenyl methane. The distribution of the molecules is consistent with the random-coil model when neither etching nor strains are applied. Bisphenol-A groups distributed at random in the polymer are imaged in DGEBA as units 10 Å long and 5 Å wide, whereas larger isometric diffracting domains (10-15 Å) are imaged in polyimides.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1982.180200402
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