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Basic structure–property behavior of UV curable polyurethane acrylates

✍ Scribed by B. K. Kim; K. H. Lee; N. J. Jo

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
565 KB
Volume
34
Category
Article
ISSN
0887-624X

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✦ Synopsis

Effects of hard segment type, soft segment type, soft segment length, and crystallization at various levels of reactive diluent have been studied in polyurethane acrylates. PTMG-IPDI-based PU acrylates gave better soft segment-hard segment phase separation as compared with PTMG-TDI-based ones. Among PTMG-, PCL-, and PTAd-IPDI-based materials, only PTMG-based one gave clean phase separation, and PTAd-based gave the poorest phase separation. With greater phase separation, higher modulus was obtained. Crystallization of soft segment in PTAd-IPDI-based material gave a significant increase in tensile modulus and elongation at break, with a notable difference in dynamic mechanical properties.

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