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Triple composite of polystyrene/elastomer/nano calcium carbonate and preparation process thereof

A technology of nano-calcium carbonate and polystyrene, which is applied in the field of polymer processing and can solve the problems of reduced impact toughness of composite materials

Active Publication Date: 2005-03-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the polystyrene-based composite materials used in conjunction with elastomer / nano-calcium carbonate, when the content of nano-calcium carbonate is high (for example, the ratio of calcium carbonate / elastomer content > 1 / 2), the impact toughness of the composite material increases with the increase in the content of nano-calcium carbonate. increased significantly decreased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1. Add 10 kg of dried nano-calcium carbonate into a high-speed mixer, add 0.1 kg of titanate at a temperature of 80°C, and mix for 6 minutes to obtain surface-treated nano-calcium carbonate; then surface-treated nano-calcium carbonate Add 20 kg of calcium carbonate and styrene-butadiene-styrene copolymer into a double-roll rubber mixer or internal mixer, melt and blend for 6 minutes at a temperature of 125 ° C, and add 0.3 kg of initiator dicumyl peroxide , continue mixing for 3 minutes, pull the tablet and granulate; add 100 kg of polystyrene to the co-rotating twin-screw extruder after the pellets are dried and blend, extrude, pelletize, and the The temperature of each section is 120°C, 140°C, 160°C, 180°C, 190°C, 190°C, and the screw speed is 120-200rpm; finally, the above pellets are injection-molded with an injection molding machine, the injection temperature is 160-200°C, and the injection speed The pressure is 0.08m / s, the pressure is 50MPa, and the high-performa...

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PUM

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Abstract

The invention discloses a polystyrene / elastomer / nano CaCO3 composite and its preparing method, and its character: adding dry nano CaCO3 10-60 weight shares to a high speed mixer, adding in surface processing agent in 0.05-3.00 weight shares at 60-100 deg.C to mixing for 6 minutes, and making surface-processed nano CaCO3; then adding the surface-processed nano CaCO3 and elastomer in 10-60 weight shares to a double-roller glue refiner or a densifier to commix at 120-140 deg.C for 5-10 minutes, add in initiator in 0.01-1.20 weight share, continuing mixing for 2-5 minutes, drawing into pieces and granulating; then adding the made particles after dried and polystyrene in 100 weight shares to a codirectional double screw extruder for commixing, extruding and cutting into particles, and obtaining a high-performance modified polystyrene composite. The temperature of the double screw extruder is 120 -190 deg.C, and the screw speed of the double screw extruder is 120-200 rpm.

Description

1. Technical field [0001] The invention relates to a polystyrene / elastomer / nanometer calcium carbonate ternary composite material and a preparation method thereof, belonging to the field of polymer processing. 2. Background technology [0002] Polystyrene is one of the three general-purpose plastics, but it is brittle. How to increase its impact toughness without greatly reducing rigidity and strength while reducing material cost is a hot spot in the research of polystyrene blend modification. Adding elastomers can significantly improve the impact toughness of polystyrene (Li Binghai, Zhang Guiyun, Song Xiumiao, etc., Properties and Morphology of SBS Modified Polystyrene, Plastics, 1990, 19(2): 3-7), but it is greatly reduced The rigidity and strength of the material also increases the cost of the material. When adding the elastomer, adding nano-calcium carbonate can improve the impact strength of the composite material under certain conditions (Yuan shao yan, Huang Rui, W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/26C08L25/06
Inventor 黄锐袁绍彦
Owner SICHUAN UNIV