Free volume of cis-1,4 polyisoprene/polybutadiene blends

SummaryThe number and radius of molecular order free space present in polybutadiene (PBD)/polyisoprene (PIP) blend were observed by positron life-time measurement, and apparent free volume fraction was estimated. The changes in the number and radius of the free space were not represented to be a lin...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2000-11, Vol.45 (3), p.275-279
Main Authors: AKIYAMA, Saburo, KAWAHARA, Seiichi, AKIBA, Isamu, IIO, Satoshi, LI, Hong-Ling, UJIHIRA, Yusuke
Format: Article
Language:English
Subjects:
Applied sciences
Coefficient of variation
Exact sciences and technology
Linear functions
Organic polymers
Physicochemistry of polymers
Polybutadiene
Properties and characterization
Thermal and thermodynamic properties
Thermal expansion
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Summary:SummaryThe number and radius of molecular order free space present in polybutadiene (PBD)/polyisoprene (PIP) blend were observed by positron life-time measurement, and apparent free volume fraction was estimated. The changes in the number and radius of the free space were not represented to be a linear function of blend composition. The apparent free volume fraction increased by mixing PBD with PIP and was approximated by a concave curve depicted against blend composition, even though the excess volume of mixing was proved to be negative. The change in the apparent free volume fraction was related to the variation of thermal expansion coefficient on blend composition.
ISSN:0170-0839
1436-2449
DOI:10.1007/pl00006836