✦ LIBER ✦

A study on the glass transition behavior and morphology of semi-interpenetrating polymer networks

✍ Scribed by Ying Li; Sufen Mao

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 399 KB
Volume: 34
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19960915)34:12<2371::aid-pola11>3.0.co;2-5

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✦ Synopsis

The epoxy resin/polyurethane semi-IPN was prepared and the glass transition behavior of the semi-IPN was discussed with DSC and DMA methods. The results show that the two glass transition temperatures (T,) referring to epoxy resin and polyurethane respectively get closer. Between the two T, there exists another Tg related to the interface between the two polymers. SEM indicates that this semi-IPN has a two-phase continuous structure which changes with different weight compositions. This is also proved by testing the Young's modulus. It is found that the IPN system has a cellular structure. Comparatively, the compatibility between the two polymers is the best when the weight ratio of EP/PU is 70/30.

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