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Preparation method of wide-distribution hyperbranched polyethylene

A hyperbranched polyethylene, wide distribution technology, applied in the field of preparation of wide distribution hyperbranched polyethylene, to achieve the effect of mild and controllable reaction

Pending Publication Date: 2021-01-12
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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However, there are few studies involving the molecular weight d

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  • Preparation method of wide-distribution hyperbranched polyethylene
  • Preparation method of wide-distribution hyperbranched polyethylene
  • Preparation method of wide-distribution hyperbranched polyethylene

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Abstract

The invention discloses a preparation method of wide-distribution hyperbranched polyethylene. The preparation method comprises the following steps: taking an alpha-diimine nickel catalyst as a main catalyst; and performing ethylene polymerization by taking at least one selected from alkyl aluminum, alkyl aluminum hydrolysate or halogenated alkyl aluminum as a cocatalyst and at least one selected from diethyl zinc, dimethyl zinc, dipropyl zinc or dibutyl zinc as an auxiliary agent. The obtained hyperbranched polyethylene has wider molecular weight distribution, and the distribution is controllable.

Description

technical field [0001] The invention relates to hyperbranched polyethylene, in particular to a preparation method of wide distribution hyperbranched polyethylene. Background technique [0002] Hyperbranched polyethylene (HBPE) has a compact dendritic spherical structure, less molecular entanglement, and is not easy to crystallize, and its hydrodynamic properties show typical Newtonian fluid behavior. Therefore, compared with high-density polyethylene (HDPE), low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE), HBPE has superior processing performance, better film formation and film light transmittance, etc. . Moreover, when the degree of branching increases, the glass transition temperature Tg will decrease. At room temperature, polyethylene is in a rubber state and is an elastomer, which has great industrial application value. [0003] At present, the best way to obtain hyperbranched polyethylene is to use late transition metal catalysts. In 1995,...

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Application Information

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IPC IPC(8): C08F110/02C08F4/70C08F2/44C08K5/56
CPCC08F110/02C08F4/7006C08F2500/04C08F2/44C08K5/56
Inventor 郭峰李传峰柴子斌汪文睿
Owner SINOPEC YANGZI PETROCHEM