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Modified PVDC polymer as well as preparation method and application thereof

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

Active Publication Date: 2021-07-02
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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  • Modified PVDC polymer as well as preparation method and application thereof
  • Modified PVDC polymer as well as preparation method and application thereof
  • Modified PVDC polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

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

[0047] (2) Preparation of oil phase: Feed vinylidene chloride, vinylidene chloride, glycidyl methacrylate, and dimethyl diallyl ammonium chloride according to the mass ratio of 90:5:4:1, and then add monomers The EHP of total mass 0.6wt% prepares oil phase as initiator;

[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, and polymerize under the stirring condition of 600rpm, the reaction time is 24h, filter, wash with water, and dry to prepare The obtained modified PVDC polymer had a weight-average molecular weight of 61,000, a PDI of 2.04, and a melting temperature of 142.8°C.

preparation example 2

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

[0051] (2) Preparation of oil phase: Feed vinylidene chloride, vinylidene chloride, glycidyl methacrylate, and dimethyl diallyl ammonium chloride according to the mass ratio of 80:10:7:3, and then add monomers The EHP of total mass 0.6wt% prepares oil phase as initiator;

[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, and polymerize under the stirring condition of 600rpm, the reaction time is 24h, filter, wash with water, and dry to prepare The obtained modified PVDC polymer had a weight-average molecular weight of 62,000, a PDI of 2.09, and a melting temperature of 142.7°C.

preparation example 3

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

[0055] (2) Prepare the oil phase: feed vinylidene chloride, vinylidene chloride, glycidyl methacrylate, and dimethyl diallyl ammonium chloride according to the mass ratio of 87:6:5:2, and then add the monomer The EHP of total mass 0.6wt% prepares oil phase as initiator;

[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, and polymerize under the stirring condition of 600rpm, the reaction time is 24h, filter, wash with water, and dry to prepare The obtained modified PVDC polymer had a weight-average molecular weight of 62,000, a PDI of 2.07, and a melting temperature of 142.5°C.

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Abstract

The invention relates to a modified PVDC polymer. Monomers of the modified PVDC polymer comprise vinylidene chloride, dichloroethylene, glycidyl methacrylate and a cationic monomer, the modified PVDC polymer is obtained through a suspension polymerization method, and an adopted dispersing agent is a compound of water-soluble cellulose and polyvinylpyrrolidone. The prepared PVDC polymer is moderate in molecular weight distribution, and non-uniformly distributed chain segments can play a role in internal plasticization. The biological rotating disc prepared by the invention is waterproof and corrosion-resistant, the phenomena of disintegration, corrosion and the like cannot occur when the biological rotating disc is used in wastewater treatment under a wide pH condition for a long time, and the mechanical strength is basically not reduced. When the modified PVDC polymer disclosed by the invention is used for preparing a biological rotating disc material, a plasticizer does not need to be added, so that thermal decomposition caused by adding the plasticizer in a processing process is avoided; on the other hand, the stability of the biological rotating disc in water is also enhanced.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a modified PVD polymer and its preparation method and application. Background technique [0002] Biological turntable technology is a kind of 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 can be obtained in a short biological contact time Effect. The biological turntable assembly is a plurality of discs installed on the rotating shaft after intervals, and each disc is partially immersed in sewage, and the sewage is in contact with the aerobic bacteria attached to the discs for biological treatment. [0003] The disc of the biological turntable is the main component and a key factor affecting the effect of wastewater treatment. The performance of the disc is of great significance. In order for the biological turnt...

Claims

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Application Information

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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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