St/MAH-g-MMA (styrene/maleic anhydride-grafted-methyl methacrylate) graft copolymer, and preparation method and application thereof

A graft copolymer and unsaturated technology, applied in the field of St/MAH-g-MMA graft copolymer and its preparation, achieves the effects of easy control of process conditions, stable alloy performance and good compatibility

Active Publication Date: 2014-09-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • St/MAH-g-MMA (styrene/maleic anhydride-grafted-methyl methacrylate) graft copolymer, and preparation method and application thereof
  • St/MAH-g-MMA (styrene/maleic anhydride-grafted-methyl methacrylate) graft copolymer, and preparation method and application thereof
  • St/MAH-g-MMA (styrene/maleic anhydride-grafted-methyl methacrylate) graft copolymer, and preparation method and application thereof

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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 2 mol, 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 a mercapto group at the end;

[0047] 3) Synthesis of PMMA macromonomer

[0048] Continue to add 0.05 mol 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 m...

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 0.05 mol 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, 0.5 mol of styr...

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Abstract

The invention relates to an St/MAH-g-MMA (styrene/maleic anhydride-grafted-methyl methacrylate) graft copolymer, and a preparation method and application thereof, belonging to the technical field of high polymer synthesis. The synthesis technique of the St/MAH-g-MMA graft copolymer comprises a RAFT (reversible addition-fragmentation chain transfer) polymerization process using thioester as a chain-transfer agent, MMA macromolecule monomer synthesis, and preparation of the St/MAH-g-MMA graft copolymer. The method can be used for preparing series of graft copolymers with different chain lengths. The St/MAH-g-MMA graft copolymer can be used for modifying PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene) and PS (polystyrene) to improve the glossiness, surface hardness, weather resistance and the like 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 Applications(China)
IPC IPC(8): C08F290/04C08F212/08C08F222/08C08F120/14C08F8/00C08F2/38C08L69/00C08L33/12C08L51/00
Inventor 费正东陈枫范萍杨晋涛钟明强
Owner ZHEJIANG UNIV OF TECH
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