Hydrocarbon polymers containing six-membered rings in the main chain. Microstructure and properties of poly(1,3-cyclohexadiene)

Natori, Itaru; Imaizumi, Kimio; Yamagishi, Hideyuki; Kazunori, Miyuki

doi:10.1002/(sici)1099-0488(19980730)36:10<1657::aid-polb7>3.0.co;2-m

Cited by 96 publications

(125 citation statements)

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“…By partial hydrogenation of PB without saturated PCHD, ultimate stress increased to 14.0 MPa with beter strain at break of 570%, indicating a stronger physical cross-linking. The end block PCHD of this triblock copolymer can completely hydrogenated into polycyclohexylene, a polyolein with T g above 231°C [35]. The completely hydrogenated triblock copolymers displayed 10.0-MPa tensile stress at 600% strain without breaking.…”

Section: Elastomers 100mentioning

confidence: 99%

Thermoplastic Elastomers Based on Block, Graft, and Star Copolymers

Wang¹,

Lu²,

Kang³

et al. 2017

Elastomers

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In this book chapter, we focus on recent advances in thermoplastic elastomers based on synthetic polymers from the aspects of polymer architectures such as linear block, graft, and star copolymers. The irst section is an introduction that covers a brief history and classiication of thermoplastic elastomers (TPEs). The second section summarizes ABA triblock copolymers synthesized by various methods for TPE applications. The third section reviews TPEs based on graft copolymers, and the fourth section reviews TPEs based on star copolymers. The diferences between TPE research in academia and industry are addressed in the last section as a perspective, with a view toward the generation of new, advanced, commercially viable TPEs.

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Section: Elastomers 100mentioning

confidence: 99%

Thermoplastic Elastomers Based on Block, Graft, and Star Copolymers

Wang¹,

Lu²,

Kang³

et al. 2017

Elastomers

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“…The 1,2-CHD units/1,4-CHD units molar ratio can be determined by two dimensional NMR. 5,6 The 1,2-and 1,4-CHD units can be regarded as the derivatives of cyclohexene. Therefore, the result of hydrogenation of cyclohexene (which is the most simple model compound for the 1,2-and 1,4-CHD units) seemed a good model for the initial screening of homogeneous catalysts for the hydrogenation of PCHD.…”

Section: Hydrogenation Of Cyclohexene As a Model Compoundmentioning

confidence: 99%

“…Actually the T g of PCHD increases with an increase in the ratio of 1,2-CHD units to 1,4-CHD units. 6,7 Thus the steric hindrance effects of molecular structure in PCHD should be considered to explain these tabulated results.…”

Section: Effect Of 12-chd Units On Hydrogenation Of Pchdmentioning

confidence: 99%

“…Furthermore, we prepared PCHE with various molecular weights and their block copolymers by the hydrogenation of PCHD homopolymer and block copolymers with heterogeneous catalysts. 6 The properties and potential applications of PCHEs as industrial materials were also reported. [6][7][8] In this paper, we report the hydrogenation of PCHD with homogeneous catalysts (Scheme 1).…”

mentioning

confidence: 99%

“…6 The properties and potential applications of PCHEs as industrial materials were also reported. [6][7][8] In this paper, we report the hydrogenation of PCHD with homogeneous catalysts (Scheme 1). The relationship between the microstructure of the polymer chain and the activity of the hydrogenation catalysts is also discussed.…”

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confidence: 99%

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Hydrogenation of Poly(1,3-cyclohexadiene)

Natori

2003

Polym J

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ABSTRACT:The hydrogenation of poly(1,3-cyclohexadiene)s (PCHDs) with various homogeneous catalysts are reported. The initial screening for hydrogenation catalysts was carried out using cyclohexene as a model compound for the monomeric unit in the polymer chain. High conversion for both cyclohexene and 1,4-linked PCHD were found with carbonylchlorohydridotris(triphenylphosphine)ruthenium(II)[RuHCl(CO)(PPh 3 ) 3 ]. The existence of units formed by 1,2-addition (the 1,2-CHD unit) in the polymer chain strongly influenced the extent of hydrogenation of PCHD. Complete hydrogenation of PCHD (polycyclohexane: PCHE) containing 1,2-CHD units was found with the cobalt(III)acetylacetonate[Co(acac) 3 ] /triisobutylaluminium[(i-C 4 H 9 ) 3 Al] system. The PCHE obtained was composed of cyclohexane rings directly connected in the main chain, and had excellent thermal stability.

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