A new approach to the study of the structure of polyisoprene obtained by cationic polymerization
Sign Up to like & getrecommendations! Published in 2019 at "Russian Chemical Bulletin"
DOI: 10.1007/s11172-019-2425-3
Abstract: The use of the T2 filter in NMR studies allowed us to separate carbon atoms by their mobility in different fragments of the macromolecular chain of polyisoprene synthesized by cationic polymerization. The NMR signals of… read more here.
Keywords: cationic polymerization; approach study; new approach; polyisoprene ... See more keywords
Bioinspired strategy to tune viscoelastic response of thermoplastic polyisoprene by retarding the dissociation of hydrogen bonding
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DOI: 10.1016/j.polymer.2020.123272
Abstract: Abstract Hydrogen bonding as a commonly used dynamic crosslink in elastomers suffered from inefficient stability against elevated temperature or low tensile rate. Herein, a bioinspired strategy was developed to retard the dissociation process, therefore resulting… read more here.
Keywords: dissociation; hydrogen bonding; polyisoprene; bioinspired strategy ... See more keywords
Incorporation of Styrene into a Model Polyolefin for Enhanced Compatibility with Polyisoprene
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DOI: 10.1021/acs.macromol.0c01781
Abstract: Polyisoprene (PI) and hydrogenated medium-vinyl polybutadiene (hPB), a polydiene–polyolefin pair, are expected to show limited compatibility (with a high interaction energy density, X, proportional... read more here.
Keywords: model polyolefin; compatibility; incorporation styrene; polyisoprene ... See more keywords
Verifying the Approximate Coinvariance of the α and Johari-Goldstein β Relaxation Times to Variations of Pressure and Temperature in Polyisoprene
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DOI: 10.1021/acs.macromol.8b00811
Abstract: From dielectric spectroscopy measurements on polyisoprene performed at ambient and elevated pressures, we show that the secondary relaxation has properties of the supposedly universal Johari–Goldstein β-relaxation. These properties include approximate (i.e., in order of magnitude… read more here.
Keywords: johari goldstein; relaxation; goldstein relaxation; approximate coinvariance ... See more keywords
Effect of Head-to-Head Association/Dissociation on Viscoelastic and Dielectric Relaxation of Entangled Linear Polyisoprene: An Experimental Test
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DOI: 10.1021/acs.macromol.9b02399
Abstract: For linear high-cis polyisoprene having a monofunctionally associative carboxyl group at the chain head (PI30-COOH; M = 30.5 × 103), linear viscoelastic and dielectric behavior was examined in its ... read more here.
Keywords: head; viscoelastic dielectric; effect head; head association ... See more keywords