Bimodal/Broad Polyethylene Prepared in a Disentangled State

被引：29

作者：

Li, Wei ^{[1
]}

Guan, Chao ^{[1
]}

Xu, Jie ^{[1
]}

Chen, Zhong-ren ^{[1
]}

Jiang, Binbo ^{[2
]}

Wang, Jingdai ^{[2
]}

Yang, Yongrong ^{[2
]}

机构：

[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Dept Polymer Engn & Sci, Ningbo 315211, Zhejiang, Peoples R China

[2] Zhejiang Univ, Dept Chem & Biochem Engn, State Key Lab Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 03期

关键词：

ETHYLENE POLYMERIZATION; MOLECULAR-WEIGHT; OLEFIN POLYMERIZATION; CATALYST; KINETICS; BEHAVIOR; CRYSTALLIZATION; HETEROGENEITY; TECHNOLOGY; DENSITY;

D O I：

10.1021/ie403315v

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Disentangled broad/bimodal polyethylene with an inverted distribution of short chain branches (SCBs) was synthesized with a supported hybrid catalyst. Poly[styrene-co-(acrylic acid)]- (PSA-) coated SiO2 particles were used to support the hybrid catalysts. The PSA was coated on SiO2-supported VCl3 catalyst. Then, Fe(acac)(3)/2,6-bis[1-(2-isopropylanilinoethyl)]-pyridine was immobilized onto the PSA layer. It was demonstrated that the Fe(acac)3/2,6-bis[1-(2-isopropylanilinoethyl)]pyridine catalyst prepared linear polyethylene with a low molecular weight (MW) and C4-C22 alpha-olefin. Meanwhile, this alpha-olefin could be used as the comonomer for VCl3 to prepare high-MW polyethylene with SCBs. Hence, broad-MW-distribution polyethylene (MWD = 120) with an inverted distribution of SCBs was obtained from only one monomer (ethylene). Interestingly, this is the first time that the synthesized polyethylene was reported to exhibit a disentangled state. The isothermal kinetics of crystallization based on the Avrami and Tobin methods was studied to obtain details about the evolution of the disentangled state during the polymerization process.

引用

页码：1088 / 1096

页数：9

共 51 条

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