Thermoplastic Resin Composition Compatibilizer for Impact Resistance
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Solution Overview
Problem
The compatibility issues arising from adding multi-component materials to polycarbonate (PC) or acrylonitrile-butadiene-styrene (ABS) blends often lead to a deterioration in physical properties such as impact resistance, flowability, and external appearance in thermoplastic resin compositions.
Innovation Solution
A thermoplastic resin composition comprising 100 parts of polycarbonate resin, 1 to 30 parts of rubber-modified aromatic vinyl graft copolymer, 1 to 30 parts of polyester resin, and 1 to 20 parts of glycol-modified polyester resin with 10 mol% to 60 mol% cyclohexanedimethanol content, along with a vinyl copolymer containing an epoxy group, which improves miscibility and dispersion of components, enhancing impact resistance and flowability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-component materials are added to polycarbonate or ABS blends, then physical properties such as impact resistance, flowability, and external appearance deteriorate
Solution Approach 1:
A compatibilizer comprising a polyolefin resin and a graft copolymer is introduced as an intermediary substance between the multi-component materials and the polycarbonate/ABS blend. The compatibilizer contains a polyolefin resin (1-50 parts) and a graft copolymer (1-50 parts) where the graft copolymer is formed by grafting a polar monomer onto a non-polar polymer chain. This compatibilizer improves interfacial adhesion and dispersion between incompatible phases, preventing deterioration of impact resistance, flowability, and external appearance while enabling the use of multi-component materials
2Strength
If rubber-modified aromatic vinyl graft copolymer and polyester resin are added to polycarbonate resin, then impact resistance improves, but compatibility issues arise causing deterioration in physical properties
Solution Approach 1:
The compatibilizer comprising polyolefin resin and graft copolymer acts as a mediator between the rubber-modified aromatic vinyl graft copolymer, polyester resin, and polycarbonate resin. The graft copolymer portion with polar groups bonds with the polyester resin, while the non-polar polymer backbone is compatible with the polycarbonate matrix, thereby maintaining impact resistance while preventing compatibility-induced deterioration of flowability and external appearance
Solution Approach 2:
The invention optimizes the compositional parameters by controlling the content of rubber-modified aromatic vinyl graft copolymer (1-30 parts) and polyester resin (1-30 parts) per 100 parts of polycarbonate resin, and simultaneously controlling the compatibilizer composition (polyolefin resin 1-50 parts, graft copolymer 1-50 parts). This parameter optimization ensures adequate impact resistance while preventing excessive compatibility issues that would deteriorate other physical properties
Data Source
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AI summary
A thermoplastic resin composition of the present invention includes a polycarbonate resin; a rubber-modified aromatic vinyl graft copolymer; a polyester resin; a glycol-modified polyester resin having about 10 mol% to about 60 mol% of a cyclohexanedimethanol (CHDM) content based on a total amount of a diol component; and a vinyl copolymer including an epoxy group. The thermoplastic resin composition has good impact resistance, flowability, external appearance and the like.