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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: 2006-11-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 10Kg of dried nano-calcium carbonate into a high-speed mixer, add 0.1Kg 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 20Kg of calcium and styrene-butadiene-styrene copolymer into a two-roll rubber mixer or internal mixer, melt and blend at a temperature of 125°C for 6 minutes, add 0.3Kg of dicumyl peroxide as an initiator, and continue Mix for 3 minutes, pull the tablet, and granulate; then dry the pellets and add 100Kg of polystyrene to the co-rotating twin-screw extruder for blending, extrusion, pelletizing, and the temperature of each section of the twin-screw extruder 120°C, 140°C, 160°C, 180°C, 190°C, 190°C, the screw speed is 120-200rpm; finally, the above-mentioned pellets are injection-molded with an injection molding machine, the injection temperature is 160-200°C, and the injection speed is 0.08m / s, the pressure is 50MPa, and a high-performan...

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Abstract

The invention discloses a polystyrene / elastomer / nano-calcium carbonate ternary composite material and a preparation method thereof. 100°C, add 0.05-3.00 parts by weight of surface treatment agent and mix for 6 minutes to obtain surface-treated nano-calcium carbonate; In a mixing machine or an internal mixer, blend at a temperature of 120-140°C for 5-10 minutes, add 0.01-1.20 parts by weight of an initiator, continue mixing for 2-5 minutes, pull tablets and granulate; then dry the pellets and mix them with 100 parts by weight of polystyrene are added into a co-rotating twin-screw extruder for blending, extruded and pelletized to obtain a high-performance modified polystyrene composite material. The temperature of the twin-screw extruder is 120°C-190°C, and the screw speed is 120-200rpm; the above-mentioned pellets can be injection-molded to obtain high-performance samples or products.

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 Patents(China)
IPC IPC(8): C08L25/06C08K3/26
Inventor 黄锐袁绍彦
Owner SICHUAN UNIV
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