A kind of modified pvdc polymer and its preparation method and use

A polymer and modification technology, applied in the field of polymers, can solve the problems of inconvenient melt processing, unstable materials and high melting temperature, and achieve the effects of avoiding thermal decomposition, good stability and excellent comprehensive performance.

Active Publication Date: 2022-07-08
青海洁神环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PVDC material used is often a copolymer of vinylidene chloride (VDC) and vinyl chloride (VC). Individual polyvinylidene chloride has high crystallinity, high melting temperature, and inconvenient melt processing. If the processing temperature is too high, it will cause material instability

Method used

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  • A kind of modified pvdc polymer and its preparation method and use
  • A kind of modified pvdc polymer and its preparation method and use
  • A kind of modified pvdc polymer and its preparation method and use

Examples

Experimental program
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Effect test

preparation example 1

[0046] (1) prepare water phase: add 10wt% HPMC and 5wt% polyvinylpyrrolidone in water as dispersant, stir to obtain water phase;

[0047] (2) Preparation of oil phase: vinylidene chloride, vinylidene chloride, glycidyl methacrylate, dimethyldiallyl ammonium chloride are charged according to the mass ratio of 90:5:4:1, and then monomers are added The total mass of 0.6wt% EHP is used as the initiator to prepare the oil phase;

[0048] (3) Add the water phase to the oil phase, the mass ratio of the water phase and the oil phase is 1:1, heat to 80 ° C, maintain the temperature range, carry out polymerization under the stirring condition of 600 rpm, the reaction time is 24h, filter, wash with water, and dry to prepare A modified PVDC polymer was obtained with a weight-average molecular weight of 61,000, PDI=2.04, and a melting temperature of 142.8°C.

preparation example 2

[0050] (1) prepare water phase: add 12wt% HPMC and 3wt% polyvinylpyrrolidone in water as dispersant, stir to obtain water phase;

[0051] (2) Preparation of oil phase: vinylidene chloride, vinylidene chloride, glycidyl methacrylate, dimethyldiallyl ammonium chloride are charged according to the mass ratio of 80:10:7:3, and then monomers are added The total mass of 0.6wt% EHP is used as the initiator to prepare the oil phase;

[0052] (3) Add the water phase to the oil phase, the mass ratio of the water phase and the oil phase is 1:1, heat to 80 ° C, maintain the temperature range, carry out polymerization under the stirring condition of 600 rpm, the reaction time is 24h, filter, wash with water, and dry to prepare A modified PVDC polymer was obtained with a weight average molecular weight of 62,000, PDI=2.09 and a melting temperature of 142.7°C.

preparation example 3

[0054] (1) prepare water phase: add 10wt% HPMC and 5wt% polyvinylpyrrolidone in water as dispersant, stir to obtain water phase;

[0055] (2) Preparation of oil phase: vinylidene chloride, vinylidene chloride, glycidyl methacrylate, dimethyldiallyl ammonium chloride are charged according to the mass ratio of 87:6:5:2, and then monomers are added The total mass of 0.6wt% EHP is used as the initiator to prepare the oil phase;

[0056] (3) Add the water phase to the oil phase, the mass ratio of the water phase and the oil phase is 1:1, heat to 80 ° C, maintain the temperature range, carry out polymerization under the stirring condition of 600 rpm, the reaction time is 24h, filter, wash with water, and dry to prepare A modified PVDC polymer was obtained, with a weight average molecular weight of 62,000, PDI=2.07, and a melting temperature of 142.5°C.

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Abstract

The present invention relates to a modified PVDC polymer. The modified PVDC polymer monomers include vinylidene chloride, vinylidene chloride, glycidyl methacrylate and cationic monomers. The modified PVDC polymer is prepared by suspending It is obtained by a polymerization method, and the dispersant used is a compound of water-soluble cellulose and polyvinylpyrrolidone. The molecular weight distribution of the prepared PVDC polymer is moderate, and the uneven distribution of the chain segments can play the role of internal plasticization. The biological turntable disc prepared by the invention is waterproof and corrosion-resistant, and can be used in wastewater treatment under wide pH conditions for a long time without disintegration, corrosion and other phenomena, and the mechanical strength is basically not decreased. The modified PVDC polymer of the present invention does not require an external plasticizer when preparing the biological turntable material, thereby avoiding thermal decomposition during processing caused by adding plasticizers; on the other hand, it also enhances the biological turntable disc in water. stability.

Description

technical field [0001] The invention belongs to the field of macromolecules, and specifically relates to a modified PVD polymer and a preparation method and application thereof. Background technique [0002] Biological turntable technology is a biofilm sewage treatment technology, which has the advantages of flexible design, convenient installation, simple operation, low operating cost, no need for aeration, energy saving, and high purification in a short biological contact time. Effect. The biological turntable assembly is installed on the rotating shaft after a plurality of discs are spaced apart. Each disc is partially immersed in sewage, and the sewage contacts the aerobic bacteria attached to the disc for biological treatment. [0003] The platter of the biological turntable is the main component and the key factor affecting the effect of wastewater treatment. The performance of the platter is very important. In order for the biological turntable to have high process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F214/12C08F220/32C08F226/02C08F2/20D01F6/48D01F1/10D04H3/007D04H3/07D04H3/12C02F3/08
CPCC08F214/08C08F2/20D01F6/48D01F1/10D04H3/007D04H3/07D04H3/12C02F3/082C08F214/12C08F220/325C08F226/02Y02W10/10
Inventor 柴建中柴伟贺左浩
Owner 青海洁神环境科技股份有限公司
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