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Method for fixed-point functionalization of polyolefin material and continuous production method of fixed-point functionalized polyolefin material

A polyolefin and functionalization technology, applied in the field of fixed-point functionalized polyolefin materials, can solve the problems of limiting the use effect of functionalized PP, the uncontrollable maleic anhydride group, and the inability to actually meet the application requirements. Effects of large-scale industrial production, ease of large-scale industrial production, and simplified production process

Active Publication Date: 2018-04-24
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the entire functional grafting process, PP macromolecular free radicals are prone to β scission, resulting in random distribution of free radicals on the molecular chain, which in turn causes grafted maleic anhydride groups to be uncontrollably grafted on the polycarbonate. The specific position of the propylene molecular chain greatly limits the use effect of functionalized PP and cannot effectively meet the needs of practical applications

Method used

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  • Method for fixed-point functionalization of polyolefin material and continuous production method of fixed-point functionalized polyolefin material
  • Method for fixed-point functionalization of polyolefin material and continuous production method of fixed-point functionalized polyolefin material
  • Method for fixed-point functionalization of polyolefin material and continuous production method of fixed-point functionalized polyolefin material

Examples

Experimental program
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Effect test

Embodiment 1

[0092] 1) Stir polypropylene (brand T30S) and di-tert-butyl peroxide evenly (the mass ratio of polypropylene to di-tert-butyl peroxide is 100:0.1) and then add it to a twin-screw extruder (length-to-diameter ratio is 48), The degraded polypropylene wire rod (or simply referred to as "wire") is obtained by melting and extruding in a staged heating manner. The temperature of the feeding section of the twin-screw extruder is 185°C, the temperature of the melting and homogenizing section is 220°C, and the temperature of the head is 210°C. The screw speed was 80 rpm.

[0093] 2) The degraded polypropylene wire is pulled into the reaction tank by the pulling action of the sliding roller in the pelletizer, the wire is immersed in the reaction solution, the temperature of the reaction solution is 80°C, and the ultraviolet wavelength of the reaction solution is 254nm. 200μW / cm 2 , the residence time of the wire rod in the reaction solution is 300s, and the end group functionalization ...

Embodiment 2

[0102] 1) Stir polypropylene (grade PP-H-GD320) and 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane evenly (polypropylene and 2,5-dimethyl -2,5-bis(tert-butyl peroxy) with a mass ratio of 100:0.1) was added to a twin-screw extruder (aspect ratio of 48), and melted and extruded by segmental heating to obtain degraded polypropylene wire (or simply referred to as "wire"), the temperature of the feeding section of the twin-screw extruder is 130°C, the temperature of the melting and homogenizing section is 230°C, the temperature of the head is 190°C, and the screw speed is 300 rpm.

[0103] 2) The degraded polypropylene wire is drawn into the reaction solution tank by the pulling effect of the sliding roller in the pelletizer, the wire is immersed in the reaction solution, the temperature of the reaction solution is 100°C, and the ultraviolet wavelength of the reaction solution is irradiated at 254nm. Intensity is 100μW / cm 2 , the residence time of the wire rod in the reaction soluti...

Embodiment 3

[0112] 1) Stir propylene and α-olefin copolymer (brand name Vistamaxx6102) and dicumyl peroxide evenly (the mass ratio of polyolefin to dicumyl peroxide is 100:10) and then add them into a twin-screw extruder (long diameter The ratio is 48), and the degraded polypropylene wire (or simply referred to as "wire") is obtained by melting and extruding in a staged heating manner. The temperature of the feeding section of the twin-screw extruder is 190 ° C, and the temperature of the melting and homogenizing section is 190 ° C. The temperature is 190° C., and the screw speed is 50 rpm.

[0113] 2) The degraded polypropylene wire is drawn into the reaction tank by the pulling effect of the sliding roller in the pelletizer, the wire is immersed in the reaction solution, the temperature of the reaction solution is 65°C, and the ultraviolet wavelength of the reaction solution is 365nm. 50μW / cm 2 , the residence time of the wire rod in the reaction solution is 200s, and the end group fun...

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Abstract

The invention discloses a method for fixed-point functionalization of a polyolefin material and a continuous production method of the fixed-point functionalized polyolefin material. The method for fixed-point functionalization of the polyolefin material comprises the steps as follows: 1) polyolefin and a peroxide initiator are uniformly mixed for melt degradation, and degraded polyolefin with carbon-carbon double bonds at the tail end of a molecular chain is obtained; 2) the degraded polyolefin is immersed in a reaction solution, the reaction solution comprises a functionalization initiator, functional monomers and a surfactant, the carbon-carbon double bonds at the tail end of the molecular chain of the degraded polyolefin react with functional monomers in the reaction solution under ultraviolet irradiation, and the polyolefin material with a functionalized end group is obtained. With the adoption of the method, a functional group can be grafted at the chain end of the molecular chainof polyolefin in a fixed point manner, the grafting efficiency is higher, and the use effect of the functionalized polyolefin can be improved.

Description

technical field [0001] The invention relates to the technical field of functionalized polyolefin materials, in particular to a method for fixed-point functionalized polyolefin materials. Background technique [0002] Polyolefin, especially polypropylene (PP), as a general-purpose plastic, has outstanding stress crack resistance, wear resistance, good insulation and low dielectric rate, easy molding and processing, and can be widely used in injection molding Forming, film, fiber, hollow molding, extrusion molding and other products. However, due to the non-polarity and crystallinity of PP, it has disadvantages such as poor cold resistance, low temperature brittleness, poor dyeability and adhesion, poor creep resistance, and poor compatibility with other materials; thus Its application in the automotive industry, packaging materials, medical equipment, home appliances and other fields is limited. [0003] In order to improve the non-polar characteristics of PP and expand its...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F222/06C08F220/32C08F220/06C08F2/48C08F8/34C08F110/06B29C47/92B29B9/06B29C47/60B29C48/92
CPCB29B9/06B29C48/625B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92904B29C2948/92942C08F2/48C08F8/34C08F255/02C08F110/06C08F220/325
Inventor 王绍杰宋林霍江贝陈冠良张红李静颜晓捷孙庆磊吕兵陈海波
Owner WANHUA CHEM GRP
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