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PVC (polyvinyl chloride) functionalized master batch, preparation method and PVC-indole grafted blended product

A functional masterbatch technology, applied in the field of masterbatch preparation, indole functionalized polyvinyl chloride, can solve the problems of PVC aging degradation, process performance decline, high melt viscosity, etc., to improve tensile strength and fracture Elongation, the effect of improving mechanical properties

Active Publication Date: 2018-06-19
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PVC also has many disadvantages
For example, due to the very strong polarity of the PVC macromolecular chain structure, high melt viscosity and poor fluidity, the processing performance is severely reduced; in addition, PVC will slowly decompose and release HCl gas when heated to more than 100°C
Especially under light conditions, it will cause PVC aging and degradation

Method used

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  • PVC (polyvinyl chloride) functionalized master batch, preparation method and PVC-indole grafted blended product
  • PVC (polyvinyl chloride) functionalized master batch, preparation method and PVC-indole grafted blended product
  • PVC (polyvinyl chloride) functionalized master batch, preparation method and PVC-indole grafted blended product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve 100g of PVC, 50g of indole, and 7g of anhydrous aluminum chloride in tetrahydrofuran solvent, and keep stirring to make them evenly mixed. Then, the reactant was placed in a microwave reactor, irradiated by 400W microwave at a reaction temperature of 65° C., and reacted for 15 minutes. Purification is carried out after the reaction is completed to obtain a PVC-g-indole graft, and the measured grafting rate reaches 1.93%. Congo red test was carried out on the product, which showed that the thermal stability time was 360s.

Embodiment 2

[0043] Dissolve 100g of PVC, 50g of indole, and 7g of anhydrous aluminum chloride in tetrahydrofuran solvent, and keep stirring to make them evenly mixed. The reactor was heated with an oil bath, the reaction temperature was 65°C, and the reaction was carried out for 15 minutes. Purification is carried out after the reaction is completed to obtain a PVC-g-indole graft, and the measured grafting rate reaches 0.83%. Congo red test was carried out on the product, which showed that the thermal stability time was 300s.

Embodiment 3

[0045] Dissolve 100g of PVC, 50g of indole, and 7g of anhydrous aluminum chloride in o-dichlorobenzene solvent, and keep stirring to make it evenly mixed. Then, the reactant was placed in a microwave reactor, irradiated by 400W microwave at a reaction temperature of 65° C., and reacted for 15 minutes. After the reaction is finished, purification treatment is carried out to obtain a PVC-g-indole graft, and the measured grafting rate reaches 0.88%. Congo red test was carried out on the product, which showed that the thermal stability time was 247s.

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Abstract

The invention relates to PVC (polyvinyl chloride) functionalized master batch, a preparation method and a PVC-indole grafted blended product. The structure of the master batch is shown in the description. In order to improve the performance of PVC and overcome the defect that tert-butyl chloride, allyl chloride and the like exist in PVC macromolecular chains, a chemical grafting reaction is adopted, an indole modified PVC (PVC / indole) material with good redox and fluorescence functions and better thermal stability is prepared from aromatic indole micromolecules through an Friedel-Crafts alkylation reaction, and the stabilization and functionalization purposes of PVC are achieved through replacement of active chlorine with aromatic rings.

Description

technical field [0001] The invention relates to a polyvinyl chloride graft, in particular to a master batch of indole functionalized polyvinyl chloride and a preparation method. Background technique [0002] Polyvinyl chloride (PVC for short) is an amorphous polymer containing a small amount of crystalline structure. is vinyl chloride (CH 2 =CHCl) monomer generated by free radical polymerization, its chemical formula is (CH 2 =CHCl) n . The advantages of PVC are high mechanical strength, low price, wide source of raw materials, good flame retardancy, and chemical resistance. Its output is second only to polyethylene, ranking second in the world. In addition, as a general-purpose plastic, polyvinyl chloride (PVC) is suitable for many fields such as building materials, plastic films, medical equipment, electronic packaging, water supply and drainage pipes, etc. [i] . [0003] However, PVC also has many disadvantages. For example, due to the very strong polarity of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F14/06C08F8/30
CPCC08F8/30C08F14/06
Inventor 李侃社贺利飞朱雪丹闫兰英李苗梁耀东康洁牛红梅汪晓芹陈创前章结兵李锦
Owner XIAN UNIV OF SCI & TECH
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