PROPERTIES OF LINEAR ELASTOMERIC POLYURETHANES.

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Abstract:

The viscoelastic properties of some polyester-urethanes are compared with the properties of other polymers. The behavior observed is anomalous in that these polyurethanes exhibit an unusually high value of modulus well above their T sub g, unaccounted for by either crosslinking or crystallinity. Various experiments including incorporation of plasticizers of widely varying chemical composition have suggested interpretation of the system as a block copolymer, each block having its own T sub g. Each of the two types of blocks seems to associate with similar blocks from other molecules. Author

Author(s):
Cooper, Stuart L. ; Tobolsky, Arthur V.
Author Organization(s):
FRICK CHEMICAL LAB PRINCETON UNIV N J
Descriptive Note:
Technical rept.,
Annotation:
Properties of linear elastomeric polyurethanes.
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RLT-92
Contract/Grant Number(s):
Nonr-1858(07)
Project Number(s):
NR-356-377
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ISOCYANATES, VISCOELASTICITY, POLYMERS, PLASTICIZERS, ELASTOMERS
Field(s)/Group(s):
Plastics
Report Date:
1966 May 01