Comparative dielectric studies of segmental and normal mode dynamics of poly(oxybutylene) and poly(oxyethylene) - poly(oxybutylene) diblock copolymers

Kyritsis, A; Konsta, AA; Mai, S-M; Booth, C

dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Konsta, AA	en
dc.contributor.author	Mai, S-M	en
dc.contributor.author	Booth, C	en
dc.date.accessioned	2014-03-01T01:14:27Z
dc.date.available	2014-03-01T01:14:27Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13079
dc.subject	Dielectric Relaxation	en
dc.subject	Ethylene Oxide	en
dc.subject	Large Scale	en
dc.subject	Normal Modes	en
dc.subject.other	Brownian movement	en
dc.subject.other	Conformations	en
dc.subject.other	Crystal structure	en
dc.subject.other	Crystallization	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Molecular orientation	en
dc.subject.other	Molecular spectroscopy	en
dc.subject.other	Dielectric relaxation spectroscopy	en
dc.subject.other	Homopolymers	en
dc.subject.other	Molecular mobility	en
dc.subject.other	Normal mode dynamics	en
dc.subject.other	Polyoxybutylene	en
dc.subject.other	Segmental dynamics	en
dc.subject.other	Block copolymers	en
dc.title	Comparative dielectric studies of segmental and normal mode dynamics of poly(oxybutylene) and poly(oxyethylene) - poly(oxybutylene) diblock copolymers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/ISE.1999.832083	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ISE.1999.832083	en
heal.publicationDate	1999	en
heal.abstract	Diblock copolymers of ethylene oxide (E) and 1,2-butylene oxide (B), E30Bn, with constant E-block length of 30 units and various B-block lengths (n = 3-30), were investigated, in parallel with a series of homopoly(oxybutylene)s of similar to B-block lengths, using broadband dielectric relaxation spectroscopy (10-2-109 Hz). The normal mode relaxation process due to reorientation of the end-to-end vector, as well as the main (segmental) process caused by local chain motions, exhibited by the B-blocks in the copolymers and respectively by the homopoly(oxybutylene), were studied in comparison with each the copolymers, whereas deviations from that model have been observed for the homopolymers. The results show that the B-blocks in the copolymers, constrained between lamellar crystals created by E-blocks, exhibit slower large scale motions.	en
heal.publisher	IEEE, Piscataway, NJ, United States	en
heal.journalName	Proceedings - International Symposium on Electrets	en
dc.identifier.doi	10.1109/ISE.1999.832083	en
dc.identifier.spage	453	en
dc.identifier.epage	456	en