Studies on Sequence Distribution of Copolyureas and Relationship of Diamines Reactivity Ratio

Abstract

Abstract: Aseries of copolyureas were synthesized by using₁,6-hexanediamine(HAD), m-phenylenediamine(MPD), 4-aminophenyl ether(DDE), 4,4'-diaminodiphenyl methane(DDM), 4,4'-diaminediphenyl sulfone(DDS) and 2,4-tolyene diisocyanate(TDI). Based on the theory of sequence distribution of copolymers, a method was established which determined the sequence distribution parameters: random degree Band number average sequence length L_na and L_nb by ¹H NMRspectra and a computer program for the resolution of overlapping peaks. And the reactivity ratio of diamines with 2,4 TDIwas obtained based on the data. The result was that the diamine reactivity ratio changed in different reacting conditions.

Key words: Polyureas, Sequence distribution, Reactivity ratio, ¹H NMR

CLC Number:

O631

TrendMD:

DU Zhe-Wei, LIAN Yan-Qing, WANG Xiao-Gong, ZHOU Qi-Xiang, LIU De-Shan . Studies on Sequence Distribution of Copolyureas and Relationship of Diamines Reactivity Ratio[J]. Chem. J. Chinese Universities, 2001, 22(9): 1587.

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Studies on Sequence Distribution of Copolyureas and Relationship of Diamines Reactivity Ratio

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