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A kind of st/mah-g-mma graft copolymer and its preparation method and application

A graft copolymer, unsaturated technology, applied in the field of St/MAH-g-MMA graft copolymer and its preparation, to achieve the effects of good compatibility, controllable molecular weight, and easy process conditions

Active Publication Date: 2016-06-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report of St / MAH-g-MMA copolymer

Method used

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  • A kind of st/mah-g-mma graft copolymer and its preparation method and application
  • A kind of st/mah-g-mma graft copolymer and its preparation method and application
  • A kind of st/mah-g-mma graft copolymer and its preparation method and application

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preparation example Construction

[0036] The present invention also discloses a preparation method of St / MAH-g-MMA graft copolymer, comprising the following steps:

[0037] 1) Add an initiator and RAFT reagent to the methyl methacrylate solution to carry out RAFT active polymerization to obtain polymethyl methacrylate with a thioester group at the end. The initiator, RAFT reagent and methyl methacrylate The molar ratio of feeding is 1:5:200-300, the initiator used in the present invention is AIBN or BPO, also can be azo initiator or organic peroxide initiator, RAFT reagent is dithiobenzoic acid cyanogen One of 2,2'-[methylthiobis(thio)]bis[2-methylpropanoic acid] kind;

[0038] 2) The polymethyl methacrylate obtained in step 1) is reduced by aminolysis to reduce the terminal thioester group to a mercapto group to obtain a polymethyl methacrylate with a mercapto group. The reagent used for the ammonolysis reduction is dimethylphenylphosphine Mixture with n-hexylamine, the feeding molar ratio of dimethylphenyl...

Embodiment 1

[0043] 1) Synthesis of PMMA with a thioester bond at the end:

[0044] The synthesis method is a conventional method, wherein the molar ratio of AIBN: cyanoisopropyl dithiobenzoate: methyl methacrylate is 1:5:200, the solvent is DMF, the reaction temperature is 60°C, and the reaction time is 24h, wherein Methyl methacrylate is 2mol, and the end is a thioester bond PMMA;

[0045] 2) Synthesis of PMMA with mercapto groups at the end:

[0046] In the above reaction system, add 2 mmol of dimethylphenylphosphine and n-hexylamine respectively (the ratio of dimethylphenylphosphine and n-hexylamine is 1:2), react at room temperature for 1 hour, and obtain PMMA with mercapto groups at the end;

[0047] 3) Synthesis of PMMA macromonomer

[0048] Continue to add 0.05mol allyl methacrylate in the above reaction system, and react at room temperature for 4h to obtain PMMA macromonomer;

[0049] 4) Synthesis of St / MAH-g-PMMA graft copolymer

[0050]In the above reaction system, 0.05 mol ...

Embodiment 2

[0053] 1) Synthesis of PMMA with a thioester bond at the end:

[0054] The synthesis method is a conventional method, wherein the molar ratio of AIBN:4-cyano-4-(thiobenzoyl)pentanoic acid:methyl methacrylate is 1:5:200, the solvent is DMF, and the reaction temperature is 60°C , the reaction time is 24h, wherein MMA is 2mol, and the end is thioester bond PMMA;

[0055] 2) Synthesis of PMMA with mercapto groups at the end:

[0056] In the above reaction system, add 5 mmol of dimethylphenylphosphine and n-hexylamine respectively (the ratio of dimethylphenylphosphine and n-hexylamine is 1:2), and react at room temperature for 1 hour to obtain PMMA with a mercapto group at the end;

[0057] 3) Synthesis of PMMA macromonomer

[0058] Continue to add 0.05mol allyl methacrylate in the above reaction system, and react at room temperature for 4h to obtain PMMA macromonomer;

[0059] 4) Synthesis of St / MAH-g-PMMA graft copolymer

[0060] In the above reaction system, add 0.5mol of st...

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Abstract

A St / MAH-g-MMA graft copolymer and its preparation method and application belong to the technical field of polymer synthesis. The synthetic technique of described St / MAH-g-MMA graft includes the preparation of RAFT polymerization method, MMA macromer synthesis and St / MAH-g-MMA graft copolymer using thioester as chain transfer agent MMA technology. By adopting the method, a series of graft copolymers with different chain length structures can be prepared. The St / MAH-g-MMA graft copolymer prepared by this technology can be used in the modification of PC, ABS, and PS to improve the gloss, surface hardness, and weather resistance of the alloy.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to a St / MAH-g-MMA graft copolymer and its preparation method and application. Background technique [0002] Styrene (St) has good rigidity, transparency, and processing fluidity; maleic anhydride has very strong polarity, styrene-maleic anhydride copolymer resin (St / MAH) is used as a compatibilizer, and then polymerized with other Compounds such as PC / PMMA, ABS / PAMM or PS / PMMA blending can improve the compatibility of compound alloys and improve the mechanical properties and thermal properties. [0003] In the invention, the St / MAH compatibilizer is directly grafted with PMMA, one of the blends, to realize the chemical bond combination of the compatibilizer and PMMA, thereby strengthening the compatibility of alloys such as PC / PMMA and further improving the performance of the alloy. There is no report of St / MAH-g-MMA copolymer. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/04C08F212/08C08F222/08C08F120/14C08F8/00C08F2/38C08L69/00C08L33/12C08L51/00
Inventor 费正东王涛陈枫范萍杨晋涛钟明强
Owner ZHEJIANG UNIV OF TECH
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