US EPA

6657815 

Journal Article 

Phase separation of unsaturated polyester resin blended with poly(vinyl acetate) 

Hsieh, YN; Yu, TL; , 

1999 

Yes 

Journal of Applied Polymer Science
ISSN: 0021-8995
EISSN: 1097-4628 

JOHN WILEY & SONS INC 

NEW YORK 

73 

12 

2413-2428 

English 

10.1002/(SICI)1097-4628(19990919)73:12<2413::AID-APP10>3.0.CO;2-N 

WOS:000081476200010 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033351969&doi=10.1002%2f%28SICI%291097-4628%2819990919%2973%3a12%3c2413%3a%3aAID-APP10%3e3.0.CO%3b2-N&partnerID=40&md5=7c74d55d323fd3d2d7775a429d00d4bb
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The behavior of phase separation during the curing reaction of unsaturated polyester (UPE) resin in the presence of low profile additive, that is, poly(vinyl acetate) (PVAc), was studied by low-angle laser light scattering (LALS) and scanning electron microscopy (SEM). The experimental results revealed that the PVAc-rich phase was regularly dispersed in the cured styrene-UPE matrix for styrene-UPE resin blended with 5 wt % of PVAc. As the PVAc content was increased higher than 10 wt %, a cocontinuous PVAc and cured styrene-UPE phase was observed for the cured systems. The LALS observations were carried out in situ at a curing temperature of 100 degrees C; thus, the effect of the rate of exothermic heat released from curing reaction on the morphology of curing system was investigated and reported in this work. (C) 1999 John Wiley & Sons, Inc.