Study on the microstructures of polypropylene synthesized by a novel MgCl2-supported and low Ti-loading Ziegler-Natta catalyst

Zhenrong Zhao; Li Wang; Jianfeng Wang; Haoqi Gao; Haojie Yu; Tao Chen; Xiaochen Dong

doi:10.1163/156855507782401204

Study on the microstructures of polypropylene synthesized by a novel MgCl₂-supported and low Ti-loading Ziegler-Natta catalyst

Zhenrong Zhao, Li Wang, Jianfeng Wang, Haoqi Gao, Haojie Yu, Tao Chen, Xiaochen Dong

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

2 Scopus citations

Abstract

A novel MgCl₂-supported and low Ti-loading Ziegler-Natta (Z-N) catalyst was prepared by one-pot ball milling. Polypropylenes (PPs) with special microstructures were synthesized by using this catalyst. Complex gel-permeation chromatography (GPC) data of the resultant PPs were analyzed by fitting the molecular weight distribution (MWD) curves with multiple Flory-Schulz functions. ¹³C-NMR spectra of the PPs were also analyzed. A multi-site active center model and the probable structures of the active centers were proposed. Simulation of the pentad intensities of the PPs showed that the modeling results could satisfactorily account for the experimental data, which indicated that the multi-site active center model was plausible and reasonable.

Original language	English
Pages (from-to)	477-486
Number of pages	10
Journal	Designed Monomers and Polymers
Volume	10
Issue number	6
DOIs	https://doi.org/10.1163/156855507782401204
State	Published - 1 Nov 2007
Externally published	Yes

Keywords

Microstructure
Model
Polymerization mechanism
Stereoblock polypropylene
Ziegler-Natta catalyst

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10.1163/156855507782401204

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title = "Study on the microstructures of polypropylene synthesized by a novel MgCl2-supported and low Ti-loading Ziegler-Natta catalyst",

abstract = "A novel MgCl2-supported and low Ti-loading Ziegler-Natta (Z-N) catalyst was prepared by one-pot ball milling. Polypropylenes (PPs) with special microstructures were synthesized by using this catalyst. Complex gel-permeation chromatography (GPC) data of the resultant PPs were analyzed by fitting the molecular weight distribution (MWD) curves with multiple Flory-Schulz functions. 13C-NMR spectra of the PPs were also analyzed. A multi-site active center model and the probable structures of the active centers were proposed. Simulation of the pentad intensities of the PPs showed that the modeling results could satisfactorily account for the experimental data, which indicated that the multi-site active center model was plausible and reasonable.",

keywords = "Microstructure, Model, Polymerization mechanism, Stereoblock polypropylene, Ziegler-Natta catalyst",

author = "Zhenrong Zhao and Li Wang and Jianfeng Wang and Haoqi Gao and Haojie Yu and Tao Chen and Xiaochen Dong",

year = "2007",

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T1 - Study on the microstructures of polypropylene synthesized by a novel MgCl2-supported and low Ti-loading Ziegler-Natta catalyst

AU - Zhao, Zhenrong

AU - Wang, Li

AU - Wang, Jianfeng

AU - Gao, Haoqi

AU - Yu, Haojie

AU - Chen, Tao

AU - Dong, Xiaochen

PY - 2007/11/1

Y1 - 2007/11/1

N2 - A novel MgCl2-supported and low Ti-loading Ziegler-Natta (Z-N) catalyst was prepared by one-pot ball milling. Polypropylenes (PPs) with special microstructures were synthesized by using this catalyst. Complex gel-permeation chromatography (GPC) data of the resultant PPs were analyzed by fitting the molecular weight distribution (MWD) curves with multiple Flory-Schulz functions. 13C-NMR spectra of the PPs were also analyzed. A multi-site active center model and the probable structures of the active centers were proposed. Simulation of the pentad intensities of the PPs showed that the modeling results could satisfactorily account for the experimental data, which indicated that the multi-site active center model was plausible and reasonable.

AB - A novel MgCl2-supported and low Ti-loading Ziegler-Natta (Z-N) catalyst was prepared by one-pot ball milling. Polypropylenes (PPs) with special microstructures were synthesized by using this catalyst. Complex gel-permeation chromatography (GPC) data of the resultant PPs were analyzed by fitting the molecular weight distribution (MWD) curves with multiple Flory-Schulz functions. 13C-NMR spectra of the PPs were also analyzed. A multi-site active center model and the probable structures of the active centers were proposed. Simulation of the pentad intensities of the PPs showed that the modeling results could satisfactorily account for the experimental data, which indicated that the multi-site active center model was plausible and reasonable.

KW - Microstructure

KW - Model

KW - Polymerization mechanism

KW - Stereoblock polypropylene

KW - Ziegler-Natta catalyst

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DO - 10.1163/156855507782401204

M3 - 文章

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SN - 1385-772X

VL - 10

SP - 477

EP - 486

JO - Designed Monomers and Polymers

JF - Designed Monomers and Polymers

IS - 6

ER -

Study on the microstructures of polypropylene synthesized by a novel MgCl₂-supported and low Ti-loading Ziegler-Natta catalyst

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Keywords

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