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Zhang L.,Research Institute of Dushanzi Petrochemical Co. | Zhang L.,Xinjiang Laboratory of Rubber Plastic Materials | Zhu J.,Research Institute of Dushanzi Petrochemical Co. | Liao F.,Research Institute of Dushanzi Petrochemical Co.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2016

This paper describes the condensed structure, molecular weight and its distribution, crystallization, rheology, and thermodynamic properties of random polypropylene copolymer W0723F and three polypropylene terpolymer used for cast polypropylene film. The results show that random polypropylene copolymer W0723F have high bending modulus and melting point; butene-1 content have little difference in three polypropylene terpolymers, whose molar mass are between 5.1% and 5.4%, while the ethylene content of them are more obvious, whose molar mass ranging from 3% to 9%; the molecular chain sequence structure of two imported terpolymers consist of ethylene copolymer segment, which feature broad melting peak width, low melting point, and small crystalline size, furthermore, whose initial heat sealing temperature are low. Analysis on rheology properties indicate that the domestic product has better performance in processing fluidity. © 2016, Beijing Yanshan Branch, Assets Management Corporation, SINOPEC. All right reserved.


Wang D.,Petrochina | Wang D.,XinJiang Laboratory of Rubber Plastic Materials | Xia J.,Petrochina | Zhu J.,Petrochina | And 3 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2015

The structure characteristics, mechanical properties and processing performance of bimodal high density polyethylene (HDPE) for small blow molding container were analyzed by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and capillary rheometer. The results show that the bimodal HDPE resin for small blow molding container has excellent mechanical properties and high resistance to environmental stress cracking due to its special chain structure and characteristics of bimodal relative molecular mass distribution. The processing performance of the bimodal HDPE resin is basically same with that of unimodal chrome HDPE for small blow molding container, and the processing range of the former is slightly narrow. ©, 2015, Research Institute of Beijing. All right reserved.


Zhang L.,Research Institute of Dushanzi Petrochemical Co. | Zhang L.,Xinjiang Laboratory of Rubber Plastic Materials | Zhang B.,Research Institute of Dushanzi Petrochemical Co. | Zhang B.,Xinjiang Laboratory of Rubber Plastic Materials | And 3 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2015

The authors in this paper analyzed the basic properties, capillary and dynamic rheological properties of the imported and domestic high density polyethylene (HDPE) for intermediate bulk container (refer to as IBC barrel). The results show that the imported HDPE resins prepared with different production processes have different relative molecular mass distribution which is wider than that of domestic HDPE resin. The branching degree of imported HDPE resin is higher than that of domestic HDPE resin. The environmental stress cracking resistance time of imported HDPE resin reaches more than 2000 hours and that of domestic HDPE resin is 840 hours. The domestic HDPE resin has higher viscosity, lower elasticity, and the domestic HDPE has better impact resistance especially for low-temperature impact resistance of 20 kJ/m2. The resultant IBC barrels can meet the need of low temperature drop test. ©, 2015, Research Institute of Beijing. All right reserved.

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