Polyactic acid/polycarbonate alloy material, and preparation method and application thereof

Abstract

The invention discloses a polyactic acid/polycarbonate alloy material, and a preparation method and application thereof. The polyactic acid/polycarbonate alloy material comprises the following raw materials in part by weight: 10 to 90 parts of polycarbonate, 10 to 90 parts of polyactic acid, 1 to 20 parts of liquid crystal high polymer and 1 to 25 parts of flexibilizer. The polyactic acid/polycarbonate alloy material is prepared by adding the raw materials into a double-screw extruder to be melted and blended. The polyactic acid/polycarbonate alloy material provided by the invention has environmentally-friendly characteristics and excellent physical and mechanical properties, and greatly improves impact strength, bending modulus and heat distortion temperature. The liquid crystal high polymer is added to promote the quick crystallization of the polyactic acid, so that the prepared polyactic acid/polycarbonate alloy can be formed quickly, the forming cycle is reduced from 80 seconds to50 seconds, processing cost is reduced, flowability and fire resistance are improved, and the polyactic acid/polycarbonate alloy material is applicable in the fields of office automation (OA) equipment, communication equipment, automobile parts, domestic appliances and the like.

Description

technical field [0001] The invention relates to a polylactic acid / polycarbonate alloy material, its preparation method and its application. The polylactic acid / polycarbonate alloy material has high performance and is environmentally friendly, and can be used in office automation (OA) equipment, communication equipment, Auto parts, household appliances and other fields belong to the field of polymer processing technology. Background technique [0002] Polycarbonate has the advantages of excellent heat resistance, outstanding impact performance, wide service temperature, good dimensional stability, etc. It has been widely used in various industrial sectors, especially in automobile manufacturing and electronic and electrical industries. However, polycarbonate has the following disadvantages at the same time: high melt viscosity, difficult processing and molding, especially large-scale products, prone to stress cracking, and poor solvent resistance, which limits its application...

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Problems solved by technology

[0012] However, people's research mostly focuses on improving the compatibility, hydrolysis resistance, and electrical conductivity of polylactic acid / polycarbonate alloys, while ignoring an important issue, that is, although polylactic acid itself has crystallization properties, it does not crystallize. The rate is very slow, which will lead to slow cooling rate of the material during the forming process, long forming cycle, increased processing cost, poor dimensional stability, low thermal deformation temperature, etc., which will greatly limit the wide application of the alloy material

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