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PVC (polyvinyl chloride)/styrene polymer alloy and preparation method thereof

A styrene-based and polymer technology, applied in the field of PVC/styrene-based polymer alloys and their preparation, can solve problems such as self-crosslinking of compatibilizers, achieve good comprehensive mechanical properties, improve comprehensive mechanical properties, and impact resistance Strength-enhancing effect

Active Publication Date: 2012-10-17
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is usually difficult to find a suitable compatibilizer, as well as the synthesis of the compatibilizer, and there is a problem of self-crosslinking of the compatibilizer

Method used

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  • PVC (polyvinyl chloride)/styrene polymer alloy and preparation method thereof
  • PVC (polyvinyl chloride)/styrene polymer alloy and preparation method thereof
  • PVC (polyvinyl chloride)/styrene polymer alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The thermal stabilizer used in this embodiment is a mixture of N-benzylmaleamide acid group and lanthanum complex and calcium stearate, wherein the preparation method of N-benzylmaleamide acid group and lanthanum complex is:

[0048] Step 1. Stir and react maleic anhydride and refined benzylamine in ethyl acetate (analytical grade) until the temperature of the reaction system begins to drop. After filtering, vacuum-dry to constant weight to obtain N-benzylmaleamide acid;

[0049] Step 2, take a certain amount of N-benzylmaleamic acid described in step 1 and join in the ethanol solution of sodium hydroxide of equimolar amount, obtain the ethanol solution of N-benzylmaleamic acid sodium after the reaction is complete;

[0050] Step 3, in the ethanol solution of N-benzylmaleamide sodium described in step 2, drop stoichiometric (n La : n OA =1:3) of 0.4mol / L lanthanum chloride solution, reacted for 20 minutes at a temperature of 20°C to form a precipitate, filtered and wa...

Embodiment 2

[0064] The heat stabilizer used in this embodiment is the complex of N-allyl maleamic acid radical and samarium, and its preparation method is:

[0065] Step 1. Stir and react maleic anhydride and purified allylamine in acetone (analytical pure) until the temperature of the reaction system begins to drop, filter and vacuum dry to constant weight to obtain N-allylmaleic acid Amic acid;

[0066] Step 2, get a certain amount of N-allyl maleamic acid described in step 1 and join in the ethanol solution of the potassium hydroxide of equimolar amount, obtain the ethanol of N-allyl maleamic acid potassium after the reaction is complete solution;

[0067] Step 3, in the ethanolic solution of potassium N-allyl maleamate described in step 2, add dropwise stoichiometric (n La : n OA =1:2.5) of 0.4mol / L samarium nitrate solution, reacted for 20 minutes at a temperature of 30°C to form a precipitate, filtered and washed the precipitate, then vacuum-dried to constant weight to obtain N-a...

Embodiment 3

[0087] The heat stabilizer used in the present embodiment is the complex of N-dodecyl maleamic acid radical and dysprosium, and its preparation method is:

[0088] Step 1. Stir and react maleic anhydride and refined dodecylamine in diethyl ether (analytically pure) until the temperature of the reaction system begins to drop. After filtering, vacuum-dry to constant weight to obtain N-dodecylmaline Lyamic acid;

[0089] Step 2, take a certain amount of N-dodecylmaleamic acid described in step 1 and add it to the ethanol solution of ammonia in an equimolar amount, and obtain N-dodecylmaleamic acid salt ethanol solution after the reaction is complete ;

[0090] Step 3, in the N-dodecyl maleamic acid salt ethanol solution described in step 2, drop while stirring stoichiometric (n La : n OA =1:3.5) of 0.4mol / L dysprosium perchlorate solution, reacted for 20 minutes at a temperature of 30°C to form a precipitate, filtered and washed the precipitate, then vacuum-dried to constant w...

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Abstract

The invention discloses a PVC (polyvinyl chloride) / styrene polymer alloy. The alloy is characterized by being prepared from the following raw materials in percentage by weight: 50-95% of PVC resin, 3-30% of styrene polymer, 0.2-6% of catalyst, 0-10% of addition agent and 1.5-4% of heat stabilizer. Besides, the invention also discloses a preparation method of the PVC / styrene polymer alloy. The PVC / styrene polymer alloy material has the following advantages: not only are the defects of the existing extra compatilizer overcome, but also the alloying of PVC and styrene polymer is simpler and more convenient; anhydrous aluminium chloride, anhydrous ferric chloride or anhydrous stannic tetrachloride is taken as the catalyst; the reaction mixing / extrusion in-situ compatibilization technology is adopted, thus realizing the blending of PVC and styrene polymer; and the polymer alloy material can improve the flame retardance of the styrene polymer while reinforcing and toughening the PVC, and has industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a PVC / styrene polymer alloy and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) plastic is widely used for its good flame retardancy, wear resistance, chemical corrosion resistance, low gas and water vapor permeability, comprehensive mechanical properties, product transparency, electrical insulation, heat and sound insulation, etc. , but its processability, thermal stability, and impact toughness are poor. PVC is generally strengthened and toughened by adding calcium carbonate, kaolin and other mineral powders to the PVC matrix. The surface is modified, and sometimes the toughness is improved but the tensile strength is decreased. Styrene-based polymers have the advantages of excellent performance and good processing fluidity, but are flammable, brittle, and poor in impact resistance. Copolymerization, blending, and com...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L25/06C08L25/12C08L51/00C08L9/06C08L55/02C08L53/02C08K13/02C08K3/16C08K5/01C08K5/12C08K5/20C08K5/098
Inventor 李侃社黄虎汪晓芹牛红梅陈创前康洁李锦闫兰英梁耀东柴新树
Owner XIAN UNIV OF SCI & TECH
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