✦ LIBER ✦

Morphology of pyrolysed polystyrene–isoprene–styrene and polystyrene–butadiene–styrene block copolymers

✍ Scribed by B. D. Sarwade; R. R. Sanghavi; D. B. Sarwade; S. N. Asthana

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 568 KB
Volume: 99
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.22870

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✦ Synopsis

Abstract

The surface morphology of thermooxidative degraded polystyrene–isoprene–styrene (SIS) and polystyrene–butadiene–styrene (SBS) thermoplastic block copolymers was studied by scanning electron microscopy. Surface changes caused by heating the samples in a pyrolyzer for 15 and 30 min were presented in different micrographs. The morphological changes occurring due to the formation of polar groups and their crosslinking during the thermooxidative degradation are discussed. Morphological study of these thermally degraded polymer samples shows very good correlation with the thermodegradation results. The rate of thermodegradation is fast in case of SBS when compared with SIS block copolymer. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 2549–2553, 2006

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