Accession Number:

AD0706542

Title:

INFLUENCE DE LA STRUCTURE DU PREPOLYMERE SUR LA TEMPERATURE DE TRANSITION VITREUSE DE POLYURETHANES RETICULES (The Influence of Prepolymer Structure on Glass Transition Temperatures of Cross-linked Polyurethanes),

Descriptive Note:

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT VALCARTIER QUEBEC

Personal Author(s):

Report Date:

1969-05-05

Pagination or Media Count:

8.0

Abstract:

The influence of prepolymer structure on glass transition temperatures Tg of cross-linked polyurethanes has been studied with polysebacates from a homologous family of N-substituted bis2-hydroxyalkylamines. The tertiary amine segments have made it possible to study the effect of lengthening the side chains C1-C18 and inserting gauche interactions in the polymeric chain. The results show that in this system, adding gauche interactions has more effect on Tg than lengthening the side chains. Each time a gauche interaction is introduced in the diol segments, Tg increases by 9C. Comparisons with other systems are also presented. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE