The Relationship between Chemorheology and the Degradation Behavior of Crosslinked Polyurethane Rubber

Kenkichi Murakami; Hidetoshi Oikawa; Tsuyoshi Nagai

doi:10.1678/rheology1973.17.2_77

The Relationship between Chemorheology and the Degradation Behavior of Crosslinked Polyurethane Rubber

Kenkichi Murakami, Hidetoshi Oikawa, Tsuyoshi Nagai

Polymer Hybrid Materials Research Center

Research output: Contribution to journal › Article › peer-review

Abstract

Chemorheology is the best means to elucidate the degradation mechanism of crosslinked polymer at its initial stage. Most of chemorheological research which have been carried out all this while are those related to the scission mechanism of main-chains. The paper deals with the scission mechanism of crosslink site of crosslinked polymers which case is very rare. Polyurethane vulcanizatcs are exposed in N₂ gas at high temperatures, 383, 393 and 403K, and in the solution of n-BuNH₂/DMSO at 298, 303 and 308K. Chemical relaxation curves thus obtained were found to be consistent with theoretical prediction by Tobolsky. The scission mechanism of crosslink sites of polyurethane vulcanizates was also studied by the swelling, GPC, and IR measurements.

Original language	English
Pages (from-to)	77-85
Number of pages	9
Journal	Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
Volume	17
Issue number	2
DOIs	https://doi.org/10.1678/rheology1973.17.2_77
Publication status	Published - 1989 Jan 1

Keywords

Chemorheology
Crosslinked polyurethane rubber

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "Chemorheology is the best means to elucidate the degradation mechanism of crosslinked polymer at its initial stage. Most of chemorheological research which have been carried out all this while are those related to the scission mechanism of main-chains. The paper deals with the scission mechanism of crosslink site of crosslinked polymers which case is very rare. Polyurethane vulcanizatcs are exposed in N2 gas at high temperatures, 383, 393 and 403K, and in the solution of n-BuNH2/DMSO at 298, 303 and 308K. Chemical relaxation curves thus obtained were found to be consistent with theoretical prediction by Tobolsky. The scission mechanism of crosslink sites of polyurethane vulcanizates was also studied by the swelling, GPC, and IR measurements.",

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