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SYNTHESIS OF POLYMER MATERIALS BY LOW-ENERGY ELECTRON-BEAM .6. DSC ANALYSIS OF EB-CURED POLYURETHANE-ACRYLATE
被引：2
作者：
ANDO, M
URYU, T
机构：
[1] Dai Nippon Printing Co, Tokyo, Jpn, Dai Nippon Printing Co, Tokyo, Jpn
关键词：
CALORIMETRY;
-;
POLYMERS;
Crosslinking;
D O I：
10.1295/koron.44.787
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ;
080501 ;
081704 ;
摘要：
The gel films obtained by electron beam (EB) solid-state polymerization of urethane-acrylate prepolymers were characterized by differential scanning calorimetry (DSC). Two kinds of urethane-acrylates were synthesized by reaction of poly(butylene adipate)diol (PBAD), 4,4 prime -diphenylmethane diisocyanate (MDI) and 2-hydroxyethyl acrylate (HEA) for this purpose. One is a semicrystalline prepolymer (UA-251M) with a number average molecular weight (M OVER BAR //n) of 3200, and the other is an amorphous one (UA-071M) with M OVER BAR //n of 1450. The molecular weight between crosslinking junctions was found to be larger than the M OVER BAR //n of the prepolymer. The crosslinking by the EB polymerization restricted the mobility of the polymer chain less strongly than the crosslinking by the three-functional isocyanate and alpha , phi -dihydroxy(polypropylene oxide) with a molecular weight of 1000 did.
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页码：787 / 792
页数：6
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