GEL-PHASE MODULUS OF HIGH-IMPACT POLYSTYRENE FROM DYNAMIC MECHANICAL SPECTROSCOPY.

Kefalas, V; Theocaris, PS; Kontou, E

dc.contributor.author	Kefalas, V	en
dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Kontou, E	en
dc.date.accessioned	2014-03-01T01:07:17Z
dc.date.available	2014-03-01T01:07:17Z
dc.date.issued	1988	en
dc.identifier.issn	02728397	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9911
dc.subject.other	GELS	en
dc.subject.other	POLYSTYRENES	en
dc.subject.other	DYNAMIC MECHANICAL SPECTROSCOPY	en
dc.subject.other	GEL-PHASE MODULUS	en
dc.subject.other	HIGH-IMPACT POLYSTRENE (HIPS)	en
dc.subject.other	COMPOSITE MATERIALS	en
dc.title	GEL-PHASE MODULUS OF HIGH-IMPACT POLYSTYRENE FROM DYNAMIC MECHANICAL SPECTROSCOPY.	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pc.750090310	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pc.750090310	en
heal.publicationDate	1988	en
heal.abstract	High-impact polystyrene (HIPS) constitutes a mechanically attractive composite, consisting of a glassy matrix and a rubberlike particle phase (gel phase). Dynamic mechanical spectroscopy was performed for the polystyrene matrix for three different types of HIPS as well as for the concentration gel-phase material, at the vicinity of the respective glass-transition temperatures (T//g). An approximate estimation of the gel-phase modulus was attempted by using known mechanical models. A comparison with experiments was also made. The modulus of the composite was found to be lower than the theoretical lower bound for particulate composites. This was attributed to a separate phase between gel particles and the matrix. A diffusion type variation of the modulus of this mesophase layer was estimated, and a correlation between calculated fitting parametric exponents and impact behavior of HIPS was found. Moreover, the T//ts of the materials under investigation were also measured with two independent methods.	en
heal.journalName	Polymer Composites	en
dc.identifier.doi	10.1002/pc.750090310	en
dc.identifier.volume	9	en
dc.identifier.issue	3	en
dc.identifier.spage	229	en
dc.identifier.epage	236	en