Synthesis and properties of polyethylene and polypropylene containing hydroxylated cyclic units in the main chain

Naofumi Naga; Gaku Tsuchiya; Akinori Toyota

doi:10.1016/j.polymer.2005.11.060

Synthesis and properties of polyethylene and polypropylene containing hydroxylated cyclic units in the main chain

Naofumi Naga, Gaku Tsuchiya, Akinori Toyota

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

16 Citations (Scopus)

Abstract

Polyethylene and isotactic polypropylene containing hydroxylated cyclic units were synthesized by copolymerization of ethylene or propylene and cyclodiolefins, dicyclopentadiene (DCPD), 5-vinyl-2-norbornene (VNB), 5-ethylidene-2-norbornene (ENB), with zirconocene catalysts and subsequent hydroboration reaction of residual unsaturated group. The resulting hydroxylated copolymers showed higher glass transition temperature (T_g) than the original and hydrogenated copolymers. Relationship between the cyclodiolefin content and ΔT_g (ΔT_g=difference of T _g between hydroxylated copolymer and hydrogenated copolymer) was given by a straight line independent of the structure of the comonomers. Improvement in shape memory effect was observed in the hydroxylated ethylene-VNB copolymer.

Original language	English
Pages (from-to)	520-526
Number of pages	7
Journal	Polymer
Volume	47
Issue number	2
DOIs	https://doi.org/10.1016/j.polymer.2005.11.060
Publication status	Published - 2006 Jan 13

Keywords

Copolymer
Cyclodiolefin
Hydroxylation

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2005.11.060

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abstract = "Polyethylene and isotactic polypropylene containing hydroxylated cyclic units were synthesized by copolymerization of ethylene or propylene and cyclodiolefins, dicyclopentadiene (DCPD), 5-vinyl-2-norbornene (VNB), 5-ethylidene-2-norbornene (ENB), with zirconocene catalysts and subsequent hydroboration reaction of residual unsaturated group. The resulting hydroxylated copolymers showed higher glass transition temperature (Tg) than the original and hydrogenated copolymers. Relationship between the cyclodiolefin content and ΔTg (ΔTg=difference of T g between hydroxylated copolymer and hydrogenated copolymer) was given by a straight line independent of the structure of the comonomers. Improvement in shape memory effect was observed in the hydroxylated ethylene-VNB copolymer.",

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T1 - Synthesis and properties of polyethylene and polypropylene containing hydroxylated cyclic units in the main chain

AU - Naga, Naofumi

AU - Tsuchiya, Gaku

AU - Toyota, Akinori

PY - 2006/1/13

Y1 - 2006/1/13

N2 - Polyethylene and isotactic polypropylene containing hydroxylated cyclic units were synthesized by copolymerization of ethylene or propylene and cyclodiolefins, dicyclopentadiene (DCPD), 5-vinyl-2-norbornene (VNB), 5-ethylidene-2-norbornene (ENB), with zirconocene catalysts and subsequent hydroboration reaction of residual unsaturated group. The resulting hydroxylated copolymers showed higher glass transition temperature (Tg) than the original and hydrogenated copolymers. Relationship between the cyclodiolefin content and ΔTg (ΔTg=difference of T g between hydroxylated copolymer and hydrogenated copolymer) was given by a straight line independent of the structure of the comonomers. Improvement in shape memory effect was observed in the hydroxylated ethylene-VNB copolymer.

AB - Polyethylene and isotactic polypropylene containing hydroxylated cyclic units were synthesized by copolymerization of ethylene or propylene and cyclodiolefins, dicyclopentadiene (DCPD), 5-vinyl-2-norbornene (VNB), 5-ethylidene-2-norbornene (ENB), with zirconocene catalysts and subsequent hydroboration reaction of residual unsaturated group. The resulting hydroxylated copolymers showed higher glass transition temperature (Tg) than the original and hydrogenated copolymers. Relationship between the cyclodiolefin content and ΔTg (ΔTg=difference of T g between hydroxylated copolymer and hydrogenated copolymer) was given by a straight line independent of the structure of the comonomers. Improvement in shape memory effect was observed in the hydroxylated ethylene-VNB copolymer.

KW - Copolymer

KW - Cyclodiolefin

KW - Hydroxylation

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Synthesis and properties of polyethylene and polypropylene containing hydroxylated cyclic units in the main chain

Abstract

Keywords

ASJC Scopus subject areas

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