China Petroleum & Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Gaona Aero Material Co., Ltd.

Sichuan Cisri-gaona Forging Co. Ltd

Xiaomeng Zhang

Shijun Zhang

Wenbo Song

Huijie Hu

Jie Zhang

Jinliang Qiao

Hua Yin

Dezhan Li

Hao Yuan

Tao Liu

Chao Tang

Zhenjie Liu

Fuyong Bi

Qing Shao

Meifang Guo

Luqiang Yu

Beijiang Zhang

Honghong Huang

Wenjun Wei

Huan Xu

Peiqian Yu

Jinhui Du

Yi Rong

Minqing Wang

Shaomin Lv

Jinglong Qu

Shaobin Sun

Zhiqiang Luo

Weixue Hou

Shanjie Yang

Xingfei Xie

Chengbin Yang

Rui Fu

Guanglei Wang

A microspheric ionomer having a cross-linked structure, a preparation method therefor, applications thereof, and a preparation system thereof. The ionomer comprises structure units A represented by formula (1), structure units B represented by formula (2), and a cross-linking structure provided by a cross-linking agent, M being separately selected from H, a metal cation, and a straight chain, a saturated alkyl of branched or ring-shaped C-C, R being H or a methyl; and metal cations are introduced to part of structure units A in the ionomer. The ionomer shows an outstanding effect on nucleation of PET, serves as a nucleating agent for PET modification, so as to obtain a corresponding PET composition. A system and method for continuously preparing maleic acid ester ionomer microspheres and cross-linked maleic acid ionomer microspheres, so as to achieve continuous preparation, washing and separation of ionomer microspheres, effectively stabilizes the separation effect, and avoids frequent start and stop operations of a centrifuge.

Microspheric ionomer having cross-linked structure, preparation method therefor, applications thereof, and preparation system thereof

The present invention provides a process for preparing high melt strength propylene polymer by direct polymerization, comprising that a propylene polymer with wide molecular weight distribution and containing 'very high molecular weight fraction' can be prepared by controlling the species and ratios of the external electron donors in the Ziegler-Natta catalyst system at different reaction stages according to the requirement for different molecular weight fractions in the different propylene polymerization stage of the series operation, and said polymer has excellent mechanical properties, especially with very high melt strength. The present invention also provides a propylene homopolymer with high melt strength, comprising the following features: (1) the MFR is 0.2-10 g/10 min at 230&#xb0; C. with a load of 2.16 kg; (2) the molecular weight distribution M/Mis 6-20; (3) the content of the fraction with a molecular weight higher than 5,000,000 is higher than or equal to 0.8 wt %; (4) M/Mis higher than or equal to 70. Said homopolymer can be used in the preparation of foam products, thermoforming products, biaxial stretching films, blown films and blow-molded products.

Propylene homopolymer having high melt strength and preparation method thereof

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Beijing, China

Xiaomeng Zhang