Effect of crosslinking agent on properties of PPC-P/PBS and PPC-P/PBAT copolymer
Polyester-polycarbonate copolymer(PPC-P),as a new material,has a good development prospect,but there is little research on it at present.Therefore,PPC-P brittle material was selected for performance optimization,hoping to expand the applica-tion market of the material.PPC-P was blended with different proportions of polybutylene succinate(PBS)and polybutylene tere-phthalate adipate(PBAT)to determine the optimal blending ratio,and then modified by adding diisopropylbenzene peroxide(DCP).The impact section morphology,rheological properties,mechanical and thermal properties of PPC-P/PBS/DCP and PPC-P/PBAT/DCP blends were investigated.The results show that the optimum blending ratio of PPC-P/PBS and PPC-P/PBAT is 80/20,the tensile strength is 36.9 MPa and 35.4 MPa,and the tensile elongation at break is 117%and 144%,respectively.The two glass transi-tion temperatures in differential scanning calorimetry data are close to each other,and there is a compatibilizing effect between the two polymers.After addition of DCP,the tensile strength of PPC-P/PBAT and PPC-P/PBS composites can be improved,and the complex viscosity of PPC-P/PBAT composites increases slightly with the increase of DCP content,which is conducive to processing and application.C—O—C asymmetry and symmetric bending vibration peaks at 1 160 cm-1 and 1 050 cm-1 in the infrared spectra are weakened,which verified the cross-linking of β-carbon in the PPC-P molecular chain.In summary,PPC-P/PBS/DCP composite material has better comprehensive mechanical properties and is suitable for the production of toy models.PPC-P/PBAT/DCP composite materials have lower processing viscosity,which is conducive to the application in the field of blown film packaging.
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