A kind of preparation method and application of polyvinyl chloride

A technology of polyvinyl chloride and polymerization method, applied in the direction of organic chemistry, etc., can solve problems such as the migration of plasticizers

Active Publication Date: 2020-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, this polyvinyl chloride can be used as a plasticizer for polyvinyl chloride when the degree of polymerization is low, and has a good plasticizing effect. The matrix is ​​completely compatible, thus solving the problem of migration of plasticizers

Method used

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  • A kind of preparation method and application of polyvinyl chloride
  • A kind of preparation method and application of polyvinyl chloride
  • A kind of preparation method and application of polyvinyl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the autoclave, add THF solvent (23.1g, 320.0mmol), VC monomer (20.0 g, 320.0mmol), the molar ratio of THF solvent and VC monomer is 1:1, linear xanthate RAFT reagent RAFT- 1 (2.7g, 11.5mmol), the molar ratio of monomer and corresponding RAFT reagent is 28:1, the initiator AIBN (0.20g, 1.2mmol), the molar ratio of RAFT reagent and initiator is 9.5:1, at 50℃ Under reaction 60h, after the product is precipitated in methanol, the linear PVC (structural formula and NMR 1 H NMR spectrum see figure 1 ). The degree of polymerization n of PVC in the present embodiment 1 =24.

Embodiment 2

[0033] Add dioxane solvent (114.5g, 1.3mol), VC monomer (26.6 g, 425.6mmol) in the autoclave, the molar ratio of dioxane solvent and VC monomer is 3.1:1, three-arm star Xanthate RAFT reagent RAFT-2 (10.6g, 16.0mmol), the molar ratio of monomer and corresponding RAFT reagent is 26.6:1, initiator ABVN (0.45g, 1.6mmol), the molar ratio of RAFT reagent and initiator The ratio is 10:1, react at 60°C for 24h, and precipitate the product in methanol to obtain a three-arm star-shaped linear PVC with a low degree of polymerization (structural formula and NMR 1 H NMR spectrum see figure 2 ). The degree of polymerization n of the three-arm star-shaped PVC in the present embodiment 2 =8.

Embodiment 3

[0035]Add dioxane solvent (114.5 g, 1.3 mol), VC monomer (68.8 g, 1.1 mol) in the autoclave, the molar ratio of dioxane solvent and VC monomer is 1.2:1, three-arm star Xanthate RAFT reagent RAFT-2 (11.2g, 18.0mmol), the molar ratio of monomer and corresponding RAFT reagent is 61.1:1, initiator ABVN (2.3g, 9.0mmol), the molar ratio of RAFT reagent and initiator The ratio is 2:1, react at 60°C for 30h, and precipitate the product in methanol to obtain a three-armed star-shaped PVC. The degree of polymerization n of the three-arm star-shaped PVC in the present embodiment 2 =18.

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Abstract

The invention relates to a preparation method and application of polyvinyl chloride, particularly relates to a linear or star-shaped polyvinyl chloride polymer which is prepared by polymerization of vinyl chloride (VC) monomers through a reversible addition-fragmentation transfer (RAFT) method. The polyvinyl chloride polymer with low polymerization degree can be used as a macromolecular plasticizer which is a novel macromolecular plasticizer having good plasticizing effect and characteristic of avoiding emigrating out of the matrix.

Description

technical field [0001] The invention relates to a preparation method and application of plasticized polyvinyl chloride (PVC) resin. More specifically, the present invention relates to a linear and star-shaped polyvinyl chloride polymer obtained by polymerizing vinyl chloride (VC) monomer by a reversible addition-fragmentation chain transfer polymerization (RAFT) method. And the low degree of polymerization polyvinyl chloride polymer can be used as a macromolecular plasticizer. This macromolecular plasticizer has good plasticizing effect and does not migrate out of the matrix. It is a new type of macromolecular plasticizer. . Background technique [0002] Polyvinyl chloride is a widely used thermoplastic, which is used in medical materials, toys, cables, packaging materials, decoration materials, construction materials and automobile parts, etc. At present, the method of industrial production and preparation of polyvinyl chloride is traditional free radical polymerization. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/38C08L27/06C07C329/16C08K5/38
CPCC08F2/38C08F114/06C08F2438/03C08K5/38C08L27/06C08L2205/025
Inventor 冯岸超孙中鹤汤华燊G·莫阿德张立群
Owner BEIJING UNIV OF CHEM TECH
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