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A kind of pc/pmma alloy and preparation method thereof

A technology of alloy and graft copolymer, which is applied in the field of PC/PMMA alloy and its preparation, can solve the problems of incompatibility between surface hardness and toughness, insufficient processing fluidity, poor resistance to stress cracking, etc., to improve the environment of the blending workshop, Improve the mechanical properties and stability, the effect of stable alloy performance

Active Publication Date: 2015-12-30
YIWU HUAHONG CULTURE CREATIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unmodified polycarbonate still has shortcomings, such as insufficient processing fluidity, poor stress crack resistance, poor chemical resistance, poor wear resistance, and inability to balance surface hardness and toughness.

Method used

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  • A kind of pc/pmma alloy and preparation method thereof
  • A kind of pc/pmma alloy and preparation method thereof
  • A kind of pc/pmma alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the synthesis of St / MAH-g-MMA graft copolymer (grafting thing 1)

[0035] 1) Synthesis of PMMA with a thioester bond at the end:

[0036] 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;

[0037] 2) Synthesis of PMMA with mercapto groups at the end:

[0038] In the above reaction system, add 2mmol of dimethylphenylphosphine and n-hexylamine respectively (the ratio of dimethylphenylphosphine and n-hexylamine is 1:2), react at room temperature for 1h, and obtain PMMA with a mercapto group at the end;

[0039] 3) Synthesis of PMMA macromonomer

[0040] Continue to add 0.05mol allyl methacrylate in the above reaction system, and react at room temperature for 4h to obtain PMMA macromonomer;

[0041] 4) Synthe...

Embodiment 2

[0044] Embodiment 2: the preparation of grafting object 2

[0045]The synthesis steps are the same as in Example 1, wherein the molar ratio of AIBN: 2,2'-[methylthiobis(thio)]bis[2-methylpropionic acid]:methyl methacrylate is 1:5:300 Add 2mmol of dimethylphenylphosphine and n-hexylamine (the ratio of dimethylphenylphosphine and n-hexylamine is 1:2), 0.6mmol of AIBN, to obtain St / MAH-g-PMMA, graft 2, its molecular weight is 100000, of which m, n, l are 10, 20, 50 respectively, and its structure is as follows figure 2 As shown, among them, the wave number is 1650-1450cm -1 It is the stretching vibration peak of benzene ring, 1730cm -1 It is the carbonyl stretching vibration peak on MMA and maleic anhydride.

Embodiment 3

[0046] Embodiment 3: the preparation of grafting thing 3

[0047] The synthesis steps are the same as in Example 1, wherein AIBN: 4-cyano-4-(thiobenzoyl) valeric acid: the molar ratio of methyl methacrylate is 1:5:300 to obtain St / MAH-g-PMMA , that is, grafting material 3, its molecular weight is 40000, wherein m, n, l are 1, 20, 20 respectively, and its structure is as follows image 3 As shown, among them, the wave number is 1650-1450cm -1 It is the stretching vibration peak of benzene ring, 1730cm -1 It is the carbonyl stretching vibration peak on MMA and maleic anhydride.

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Abstract

The invention discloses PC / PMMA (polycarbonate / polymethyl methacrylate) alloy and a preparation method thereof, belonging to the technical field of high molecular materials. The alloy is prepared by mixing a St / MAH-g-MMA graft copolymer as a primary modifier with PC, and comprises the following components by weight percent: 50%-80% of PC, 15%-45% of the St / MAH-g-MMA graft copolymer, 2% of an antioxidant and 3% of a light diffusant. The preparation method comprises the following steps: mixing the components, and extruding for granulating in a double-screw extruder to prepare the PC / PMMA alloy. According to the preparation method, a limited feed ratio is adopted, the St / MAH-g-MMA graft copolymer is adopted as the modifier, and the double-screw extrusion is carried out, so that the PC / PMMA alloy is obtained, the physical performance of the alloy is improved, and the tensile strength, the surface hardness, the thermal deformation temperature and the glossiness of the alloy are effectively improved; the obtained PC / PMMA alloy can be widely applied in the fields of engineering materials, electrical appliance displaying, packaging and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a PC / PMMA alloy and a preparation method thereof. Background technique [0002] Polycarbonate (Polycarbonate, PC) is a non-crystalline thermoplastic engineering plastic with excellent performance. Polycarbonate is colorless and transparent, has good heat resistance, impact resistance and dimensional stability, and has good mechanical properties at normal operating temperatures. . However, unmodified polycarbonate still has shortcomings, such as insufficient processing fluidity, poor stress crack resistance, poor chemical resistance, poor wear resistance, and inability to balance surface hardness and toughness. [0003] Polymethylmethacrylate (PMMA) is relatively cheap compared to polycarbonate. Blending with PC can improve the friction resistance, solvent resistance and processing performance of PC. At the same time, PC / PMMA alloy has a special pearlescent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L51/00C08F265/04C08F212/08C08F222/06B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B9/06B29B9/12B29C48/40B29C48/92B29C2948/92704
Inventor 费正东陈枫范萍杨晋涛钟明强
Owner YIWU HUAHONG CULTURE CREATIVE CO LTD
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