In-situ generation of a well-dispersed multiwall carbon nanotube/syndiotactic polystyrene composite using pentamethylcyclopentadienyltitanium trimethoxide anchored to multiwall carbon nanotubes

被引：4

作者：

Go, Min Jeong ^{[2
]}

Kim, So Han ^{[1
]}

Lee, Kang Mun ^{[3
]}

Lee, Hwi Hyun ^{[2
]}

Park, Hyoung-Ryun ^{[2
]}

Lee, Junseong ^{[2
]}

Park, Sungjin ^{[4
]}

Choi, Insung S. ^{[3
]}

Kim, Youngjo ^{[1
]}

机构：

[1] Chungbuk Natl Univ, Dept Chem, Cheongju 361763, Chungbuk, South Korea

[2] Chonnam Natl Univ, Dept Chem, Kwangju 500757, South Korea

[3] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[4] Inha Univ, Dept Chem, Inchon 402751, South Korea

来源：

POLYMER | 2012年 / 53卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Half-sandwich titanocene; MWCNT; Syndiotactic polystyrene; SYNDIOTACTIC POLYSTYRENE; CRYSTALLIZATION BEHAVIOR; OLEFIN POLYMERIZATION; CLAY NANOCOMPOSITES; CATALYSTS; KINETICS; PROGRESS;

D O I：

10.1016/j.polymer.2011.12.053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A well-dispersed multiwall carbon nanotube (MWCNT)/syndiotactic polystyrene (sPS) composite was prepared by simple in-situ polymerization of styrene using pentamethylcyclopentadienyltitanium(IV) trimethoxide (Cp*Ti(OMe)(3)) attached to the shortened and functionalized MWCNT (f-MWCNT). The attachment of Cp*Ti(OMe)(3) to the f-MWCNT was confirmed by thermogravimetric analysis, X-ray photoelectron spectroscopy, Fourier transformed infrared spectroscopy, and energy dispersive X-ray spectroscopy. Cp*Ti(OMe)(3) attached to pristine MWCNT in the presence of methylaluminoxane (MAO) did not produce PS, whereas Cp*Ti(OMe)(3) attached to f-MWCNT showed a high catalytic activity for the syndiospecific polymerization of styrene under the same polymerization conditions. Obtained sPS showed a narrow molecular weight distribution (PDI approximate to 2), a high SI value (>= 90%), and a high melting point (approximate to 272 degrees C). Scanning electron microscopy and transmission electron microscopy images showed that MWCNT strands were well dispersed in the MWCNT/sPS composite. Such composites had greatly improved thermal stability compared to normal sPS polymers. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：933 / 938

页数：6

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