Effect of Crystallization Behavior on Chain Distribution for Poly (ε-caprolactone) -based Polyurethanes

Four types polyurethanes were synthesized using PCL oligomers with similar molecular weight and different molecular weight distributions and 4, 4′ -diphenylmethane diisocyanate (MDI) as chain extender: Poly (narrow), Poly (wide), Poly (narrow+wide), and Poly (narrow) + Poly (wide). The crystallizati...

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Bibliographic Details
Published inKOBUNSHI RONBUNSHU Vol. 57; no. 5; pp. 277 - 281
Main Authors SHIRASAKA, Hitoshi, INOUE, Shin-ichi, OKAMOTO, Hiroshi
Format Journal Article
LanguageJapanese
Published Tokyo The Society of Polymer Science, Japan 01.01.2000
Tsukiji daisan nagaoka
Subjects
Blend
Crystallization
Distribution
Oligomer
Poly (ε-caprolactone)
Polyurethane
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ISSN0386-2186
1881-5685
1881-5685
DOI10.1295/koron.57.277

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Summary:Four types polyurethanes were synthesized using PCL oligomers with similar molecular weight and different molecular weight distributions and 4, 4′ -diphenylmethane diisocyanate (MDI) as chain extender: Poly (narrow), Poly (wide), Poly (narrow+wide), and Poly (narrow) + Poly (wide). The crystallization behavior of the polyurethanes was studied by DSC, tensile test, and WAXD. The crystallinities of the polyurethanes were in the following order: Poly (wide) >Poly (narrow) +Poly (wide) >Poly (narrow+wide) >Poly (narrow). The present study shows the importance of the distribution of caprolactone chains and their combination in the polyurethane.
ISSN:0386-2186
1881-5685
1881-5685
DOI:10.1295/koron.57.277