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PMP copolymer and preparation method thereof

A copolymer and polyethylene technology, applied in the field of PMP copolymer and its preparation, can solve the problems of unfavorable processing and application, high melting temperature, high brittleness, etc., and achieve controllable molecular weight and molecular weight distribution, high melt strength, The effect of good processability

Active Publication Date: 2021-12-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commercially available PMP material has relatively high brittleness and high melting temperature, which is not conducive to processing, production and application.

Method used

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  • PMP copolymer and preparation method thereof
  • PMP copolymer and preparation method thereof
  • PMP copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Under anhydrous and oxygen-free conditions, toluene is used as a solvent, the temperature in the reactor is controlled to 50°C, and the pressure is 0.1MPa. Ethylene gas is passed into the reactor, and triisobutylaluminum, methylalumoxane, and Catalyst A is reacted, and the reaction time is 5 minutes to obtain long-chain polyethylene; stop feeding ethylene gas, and continue the reaction for 5 minutes, so that the ethylene in the reactor is completely consumed, and PMP monomer is added to make the monomer concentration in the reactor 1M / L, sequentially add tetrakis(pentafluorophenyl) triphenylcarbenium borate, catalyst B to carry out copolymerization reaction between long-chain polyethylene and PMP, the reaction temperature is 70°C, the polymerization time is 90min, and the mixed solution obtained after the termination reaction is carried out in Precipitate in ethanol to obtain the polymer, filter it with a Buchner funnel, and dry the polymer in a vacuum oven at 40°C to obt...

Embodiment 2

[0056] Under anhydrous and oxygen-free conditions, use toluene as a solvent, control the temperature in the reactor to 70°C, and the pressure to 0.1MPa, pass ethylene gas into the reactor, and add diethylzinc, methylaluminoxane, and catalyst in sequence A reacts, and the reaction time is 10min, obtains long-chain polyethylene;

[0057] Stop feeding ethylene gas, continue to react for 5 minutes, so that the ethylene in the reactor is completely consumed, add PMP monomer, make the monomer concentration in the reactor 2M / L, add tris(pentafluorophenyl)borane, catalyst B in sequence , Copolymerize long-chain polyethylene and PMP, the reaction temperature is 70°C, the polymerization time is 90min, the mixed solution obtained after the termination of the reaction is precipitated in ethanol to obtain a polymer, filtered with a Buchner funnel, and dried in a vacuum oven at 40°C for polymerization Thing, obtains the PMP copolymer with polyethylene side chain, structural formula is as fo...

Embodiment 3

[0066] Under anhydrous and oxygen-free conditions, use toluene as a solvent, control the temperature in the reactor to 80°C, and the pressure to 0.1MPa, pass ethylene gas into the reactor, and add trimethylaluminum, methylalumoxane, and catalyst in sequence A reacts, and the reaction time is 30min, obtains long-chain polyethylene;

[0067] Stop feeding ethylene gas, continue to react for 10 minutes, so that the ethylene in the reactor is completely consumed, add PMP monomer, make the monomer concentration in the reactor 1M / L, add tri-n-butylammonium tetraphenylborate, catalyst B in sequence , Copolymerize long-chain polyethylene and PMP, the reaction temperature is 70°C, the polymerization time is 90min, the mixed solution obtained after the termination of the reaction is precipitated in ethanol to obtain a polymer, filtered with a Buchner funnel, and dried in a vacuum oven at 40°C for polymerization Thing, obtains the PMP copolymer with polyethylene side chain, structural for...

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Abstract

The invention discloses a PMP copolymer and a preparation method thereof, and belongs to the technical field of PMP copolymerization. The PMP side chain of the polymer contains a long-chain polyethylene structure. The preparation method of the polymer comprises the following steps: preparing long-chain polyethylene from a component A catalyst system; and under the catalytic action of the component B catalyst, copolymerizing ethylene and PMP to prepare the PMP copolymer. On the basis of maintaining excellent mechanical properties, thermal properties, transparency and the like of PMP, the polyPMP is endowed with the characteristics of controllable molecular weight and structure, increased toughness, good processing rheological property and the like, further processing and application of the polyPMP are facilitated, meanwhile, the preparation method is simple, and conditions are provided for wide application of the novel material.

Description

technical field [0001] The invention relates to the technical field of PMP copolymerization, in particular to a PMP copolymer and a preparation method thereof. Background technique [0002] With the development of polymer chemistry technology, polymer materials occupy an increasingly important position in daily life. Taking polyolefin as an example, it is widely used in the fields of pipe packaging, electrical and electronic, medical and health care, etc. In recent years, there has been an increasing demand for high value-added polyolefin materials with specific functions. Poly(4-methyl-1-pentene) (Poly-4-methyl-1-pentene, PMP) obtained by its polymerization is a new type of thermoplastic. The processability, light transmission and heat resistance of PMP are superior to polystyrene (PS) and polycarbonate (PC), and the transparency is even second only to plexiglass. [0003] PMP not only has a lower dielectric constant equivalent to polytetrafluoroethylene (PTFE), but also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F210/14
CPCC08F255/02C08F210/14
Inventor 潘莉刘超李悦生高欢
Owner TIANJIN UNIV
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