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Influences of Pyrophyllite on the Properties of PET/ABS/MP Blends

ZHENG Cheng1,2,3,XIAO Li-ren1,2,3,QIAN Qing-rong2,3,4, LIU Xin-ping2,3,4,HUANG Bao-quan2,3,4,XU Jing2,3,4,CHEN Qing-hua2,3,4(1.College of Materials Science and Engineering,Fujian Normal University,Fuzhou 350117,China; 2.Fujian Engineering Reserch Center of Environment-friendly Polymer Material,Fuzhou 350117,China; 3.The Institute of Fujian Modified Plastic Research and Develop Technology,Fuzhou 350117,China; 4.College of Environmental Science and Engineering,Fujian Normal University,Fuzhou 350117,China)  
Pyrophyllite was employed to enhance the synergistic flame retardancy for PET/ABS/MP blends.The influences of different proportions of pyrophyllite on various properties of PET/ABS/MP blends were studied by mechanical test,melt flow rate test,LOI,UL-94,TG,SEM and dynamic frequency sweep test.The results show that the tensile strength,flexural strength,notched impact strength and melt flow rate of PET/ABS/MP blends increase with increasing pyrophyllite to an appropriate amount.4% pyrophyllite is found to be the optimum concentration for enhancement of the synergistic flame retardancy and charring of PET/ABS/MP blends.It is also clear that raising the dosage of pyrophyllite results in increasing the storage modulus(G′) and the loss modulus(G″) of the system to a peak value and decreasing subsequently.
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