Mixing ratio control and compatibility agent

0. Five copies of epoxy resin and PP g - MAH and, PC/ABS alloy elongation at break from 90. 7% to 151. 6%. Because epoxy resin is brittle polymers, its content should be carefully controlled, epoxy resin content is too high, the impact strength of alloy is reduced, the content of epoxy resin should be less than 2. PP- g - MAH and epoxy resin composite compatilizer is only suitable for capacity expansion of low ratio of ABS plastic injection processing material PC/ABS alloy, when ABS content less than or equal to 30%, its compatibilizers obvious, but when ABS content is greater than or equal to 40%, the loss of compatibilizers, the impact strength of alloy.

PE- g - MAH capacity of PC/ABS alloy effectively, improve the impact strength of alloy. PE- g - MAH content increased from 0 to 8%, the impact strength of PC/ABS alloy, PE - g - MAH content was 4%, the tensile strength is very large. PE- g - MAH also improves the solvent resistance of the PC/ABS alloy and the stress cracking resistance, but the glass transition temperature of PE, PC components g - MAH content increase and decrease.

compatilizer could improve the compatibility of PC/ABS alloy, PC/ABS alloy stable form, enhance the interaction of two phase interface to reinforce two phase stick relay, blurring the phase interface, the interface layer thickening, so as to improve the impact strength of alloy, stress cracking resistance and other properties. Compatilizer of PC/ABS alloy to improve the performance of compatibilizers and degree depending on the type and its composition and content of compatibilizer.

ABS can improve the low temperature toughness of PC, but when the PC content lower than 50%, no obvious toughening, PC/ABS alloy Low temperature brittle transition phenomenon, ABS to PC toughening effect is poor. PC/ABS quality than about 65/35, ensures alloy has both high toughness and processing of liquidity, and moderate cost of raw materials. Most commercial grade of PC/ABS alloy, PC/ABS quality than are close to this ratio.

ABS graft copolymer are typical compatilizer of PC/ABS alloy, it can improve the notched impact strength of PC/ABS alloys, improve the stress cracking resistance, and can also improve the tensile strength. Because of the addition of compatibilizer, enhanced the reaction between the two components, the molten state under the molecular flow resistance increases, so that the viscosity of the alloy increase, melt flow rate is reduced, but compared with the pure PC alloy processing performance improved, forming the required pressure decreases. Compatilizer content is 5%, the notched impact strength of PC/ABS alloy reached a maximum.

PC/ABS blend ratio is directly related to the performance of PC/ABS. PC/ABS alloy, PC, the glass transition temperature of ABS is increased as the ratio is reduced, the glass transition temperature of ABS phase and the ABS decreases with the increasing of the proportion. In general, the tensile strength of the PC/ABS alloy, heat distortion temperature, flexural modulus, hardness between PC and ABS injection molding processing materials, has a linear relation with ABS content, approximate mixtures and rules, the notched impact strength under high PC content presents the maximum.

-页 g - Compatibilizer MAH is PC/ABS alloy. 5% of the PP - g - MAH mixed with 95% of ABS melt, then blending with PC, you can get the capacity of PC/ABS alloy. PP- g - MAH can improve the impact strength of PC/ABS alloy, yield strength and elongation at break, but the tensile modulus decreases. PP- g - MAH in combination with solid bisphenol A type epoxy resin, can better improve the compatibility of PC/ABS alloy, the alloy of yield strength, tensile modulus, elongation at break and impact strength is further improved.

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