Method for preparing PC-PS blend alloy

A technology of polystyrene and polycarbonate, which is applied in the field of preparation of polycarbonate PC-polystyrene PS blend alloy, can solve the problems of PC notch sensitivity and melt viscosity reduction, and achieve improved wear resistance and The effects of UV resistance, guaranteed transparency, and simple preparation method

Inactive Publication Date: 2009-09-16
TAIYUAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved in the present invention is to solve the problem of notch sensitivity and melt viscosity reduction of PC in the PC / PS blend alloy through research and experiment on the blending of polycarbonate PC and polystyrene PS, and find out the two The best blending process method to improve the optical and mechanical properties of mixed gold

Method used

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  • Method for preparing PC-PS blend alloy
  • Method for preparing PC-PS blend alloy
  • Method for preparing PC-PS blend alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0036] First step, preparation of polycarbonate / polystyrene blend

[0037] First, mix PS and PC according to the ratio of 7% by mass, take 0.35g of PS and 5g of PC, and then stir under heating and reflux, dissolve PS and PC in 30ml of tetrahydrofuran, and control the temperature between 45 and 55°C; Next, add 0.16 g of tetraethyl orthosilicate TEOS into the solution, then stir for 10 minutes, then add dropwise acetone and deionized water mixed solution with a pH value of 2.0 into the solution, wherein the acetone is 0.196 g, and Ionized water was 0.06g, and then refluxed and stirred for 2h to obtain PC / PS gel. After the gel is matured, the solvent is removed, and then dried at 120°C for 2 hours to obtain PC / PS / SiO 2 nanocomposites.

[0038] In the above steps, since the boiling point of tetrahydrofuran is 65.4°C, if the heating temperature is too high or too low, PC and PS will be dissolved unevenly. Therefore, the temperature between 45-55°C is the best; , when its content...

Embodiment approach 2

[0048] In the polymer blend alloy, the inorganic substances used as fillers only account for a small part, less than ten percent. In order to improve the comprehensive performance of polycarbonate, the present invention considers adding inorganic particle nano TiO 2 and nano-SiO 2to improve its performance. In order to study the influence of the content of inorganic particles on the performance of high polymers, the content of inorganic particles that can improve the comprehensive performance of polycarbonate is optimized by comparison. Therefore, according to the process method of Embodiment 1, the difference of Embodiment 2 is: nano-TiO 2 / SiO 2 Powder and PC / PS / SiO 2 The content ratio of nanocomposite material is 0.5%; In this step of the preparation of polycarbonate / polystyrene blend, PS is 3% of PC, namely 0.15g, and PC is 5g; Tetraethyl silicate is 0.05% g, acetone is 0.15g, deionized water is 0.04g; in nano-TiO 2 / SiO 2 In this step of preparation, tetraethyl ort...

Embodiment approach 3

[0050] According to the process method of Embodiment 1, the difference of Embodiment 3 is: nano-TiO 2 / SiO 2 Powder and PC / PS / SiO 2 The content ratio of the nanocomposite material is 0.5%. In the preparation step of polycarbonate / polystyrene blend, PS is 15% of PC, that is, 0.75g, PC is 5g; tetraethyl silicate is 0.25g, acetone is 0.25g, deionized water 0.08g; in nano TiO 2 / SiO 2 In this step of preparation, tetraethyl orthosilicate is 0.16 g, ammonia water is 15 ml, and KH550 is 5%.

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Abstract

A method for preparing PC-PS blend alloy comprises the following steps: after coating PC, PS and SiO2 to prepare high polymer, coating TiO2 and the SiO2 to obtain inorganic particles, and then melting the high polymer and the inorganic particles again to obtain the blend alloy. The method is simple and convenient, easy to operate and realize and short in period. The prepared blend alloy has better ultraviolet resistance, wearing resistance and weather resistance.

Description

technical field [0001] The present invention relates to a kind of preparation method of polycarbonate PC-polystyrene PS blended alloy, especially a kind of adopting sol-gel method to prepare including nano-TiO 2 / SiO 2 The preparation method of powder and PC / PS blend. Background technique [0002] There are few literature reports on the method of preparing polycarbonate PC-polystyrene PS blend alloy. Publicly reported literature has publication number CN1962759 " a kind of preparation method of polycarbonate / styrene-acrylonitrile copolymer alloy " invention patent, this invention method adopts the hydrogenated polybutadiene and styrene that do not contain double bond Block copolymers or block copolymers of hydrogenated polyisoprene and styrene are directly co-extruded with polycarbonate, styrene-acrylonitrile copolymers, and antioxidants to prepare modified polystyrene in a twin-screw extruder. Carbonate / styrene-acrylonitrile copolymer alloy. This method not only simplif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L25/06C08K9/04C08K3/22C08K3/36
Inventor 许并社魏丽乔王樱花刘伟
Owner TAIYUAN UNIV OF TECH
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