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Title: Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic Cis-1,4-Polyisoprene

Abstract

Strain-induced crystallization of crosslinked natural rubber (NR) and its synthetic analogue, cis-1,4-polyisoprene (IR), both mixed with various amounts of stearic acid (SA), were investigated by time-resolved X-ray diffraction using a powerful synchrotron radiation source and simultaneous mechanical (tensile) measurement. No acceleration or retardation was observed on NR in spite of the increase of SA amount. Even the SA-free IR crystallized upon stretching, and the overall crystallization behavior of IR shifted to the larger strain ratio with increasing SA content. No difference due to the SA was detected in the deformation of crystal lattice by stress for both NR and IR. These results suggested that the extended network chains are effective for the initiation of crystallization upon stretching, while the role of SA is trivial. These behaviors are much different from their crystallization at low temperature by standing, where SA acts as a nucleating agent.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930468
Report Number(s):
BNL-81220-2008-JA
Journal ID: ISSN 0032-3861; POLMAG; TRN: US0901396
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Polymer; Journal Volume: 48; Journal Issue: 13
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; CHAINS; CRYSTAL LATTICES; CRYSTALLIZATION; DEFORMATION; NATURAL RUBBER; OCTADECANOIC ACID; STRAINS; SYNCHROTRON RADIATION SOURCES; X-RAY DIFFRACTION; national synchrotron light source

Citation Formats

Kohjiya,S., Tosaka, M., Furutani, M., Ikeda, Y., Toki, S., and Hsiao, B. Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic Cis-1,4-Polyisoprene. United States: N. p., 2007. Web. doi:10.1016/j.polymer.2007.04.063.
Kohjiya,S., Tosaka, M., Furutani, M., Ikeda, Y., Toki, S., & Hsiao, B. Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic Cis-1,4-Polyisoprene. United States. doi:10.1016/j.polymer.2007.04.063.
Kohjiya,S., Tosaka, M., Furutani, M., Ikeda, Y., Toki, S., and Hsiao, B. Mon . "Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic Cis-1,4-Polyisoprene". United States. doi:10.1016/j.polymer.2007.04.063.
@article{osti_930468,
title = {Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic Cis-1,4-Polyisoprene},
author = {Kohjiya,S. and Tosaka, M. and Furutani, M. and Ikeda, Y. and Toki, S. and Hsiao, B.},
abstractNote = {Strain-induced crystallization of crosslinked natural rubber (NR) and its synthetic analogue, cis-1,4-polyisoprene (IR), both mixed with various amounts of stearic acid (SA), were investigated by time-resolved X-ray diffraction using a powerful synchrotron radiation source and simultaneous mechanical (tensile) measurement. No acceleration or retardation was observed on NR in spite of the increase of SA amount. Even the SA-free IR crystallized upon stretching, and the overall crystallization behavior of IR shifted to the larger strain ratio with increasing SA content. No difference due to the SA was detected in the deformation of crystal lattice by stress for both NR and IR. These results suggested that the extended network chains are effective for the initiation of crystallization upon stretching, while the role of SA is trivial. These behaviors are much different from their crystallization at low temperature by standing, where SA acts as a nucleating agent.},
doi = {10.1016/j.polymer.2007.04.063},
journal = {Polymer},
number = 13,
volume = 48,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}