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Microwave-assisted polypropylene grafting method

A polypropylene grafting and microwave-assisted technology, which is applied in the field of microwave-assisted polypropylene grafting, can solve the problems of easy sticking of reactants to the wall, low grafting rate and grafting efficiency, and uneven distribution of monomers.

Pending Publication Date: 2021-04-23
NINGBO NENGZHIGUANG NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase grafting method is a method of local modification, and the reaction is mostly at the melting point of polypropylene. The solid-phase grafting reaction of polypropylene mainly occurs on the outer surface of polypropylene particles, and the reactants are easy to stick to the wall during the reaction. , the distribution of monomers is uneven, and the grafting rate and grafting efficiency of monomers are relatively low

Method used

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  • Microwave-assisted polypropylene grafting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 0.0691g of benzoyl peroxide in 35mL of xylene, sonicate until it is completely dissolved, weigh 5.0154g of polypropylene and add it to xylene for swelling, continue to blow nitrogen into the swelling process, add 0.5105g of styrene and 0.5046g of maleic anhydride , heated with 480W microwave for 30min. After the reaction was completed and cooled to room temperature, the obtained product was extracted with acetone for 3 h, and dried at 60° C. to constant weight. The calculated grafting rate was 0.3555%.

Embodiment 2

[0037] Dissolve 0.0645g of benzoyl peroxide in 25mL of xylene and 10mL of ethylene glycol, sonicate until it is completely dissolved, weigh 5.0259g of polypropylene and add it to xylene for swelling. During the swelling process, nitrogen gas is continuously introduced, and 0.5154g of benzene is added. Ethylene and 0.5059g maleic anhydride were heated with 560W microwave for 30min. After the reaction was completed and cooled to room temperature, it was dried at 60° C. to a constant weight, and the calculated grafting rate was 1.3449%.

Embodiment 3

[0039] Dissolve 0.0642g of benzoyl peroxide in 29.2mL of xylene and 5.8mL of 1,4-butanediol, sonicate until it is completely dissolved, weigh 5.0083g of polypropylene and add it to xylene for swelling, and continue to blow nitrogen gas during the swelling process , add 0.5130g styrene and 0.5135g maleic anhydride, heat with 640W microwave for 30min. After the reaction was completed and cooled to room temperature, it was dried at 60° C. to a constant weight, and the calculated grafting rate was 1.6306%.

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Abstract

The invention discloses a microwave-assisted polypropylene grafting method, and belongs to the technical field of polymer modification. The method comprises the following steps: adding an initiator into an organic solvent, adding a certain amount of polypropylene and a grafting monomer, swelling in an inert gas environment, and irradiating the system under a microwave condition for a certain time to obtain a polypropylene grafting product. Compared with the traditional solid-phase grafting method, the method has the advantages that the reaction time can be remarkably shortened, and the grafting rate is improved.

Description

technical field [0001] The invention belongs to the field of polymer modification, and provides a microwave-assisted polypropylene grafting method which shortens the reaction time and has the same or even higher grafting rate than the traditional solid-phase grafting method. Background technique [0002] Polypropylene is a colorless and translucent thermoplastic lightweight general-purpose plastic with chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing performance, etc. It is widely used in machinery, automobiles, electronic appliances , construction, textile, packaging, agriculture, forestry, fishery and food industry and many other fields have a wide range of development and application. [0003] However, polypropylene molecules are non-polar crystalline polymers, which have poor compatibility with polar polymers and inorganic reinforcing filler materials, and poor hydrophilicity, dyeabil...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F212/08C08F222/06C08F2/46
CPCC08F255/02C08F2/46
Inventor 严洁峰方振兴张发饶
Owner NINGBO NENGZHIGUANG NEW MATERIALS TECH
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