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Morphology and mechanical behaviors of rigid organic particles reinforced polycarbonate
作者:Su YK, Sai T, Ran SY, Fang ZP, Guo ZH*
關鍵字:Rigid organic particles,Styrene-acrylonitrile copolymer,Polycarbonate,Compatibilizer,Mechanical properties,Morphology
論文來源:期刊
具體來源:J. Appl. Polym. Sci., 2021, 138: e49762
發表時間:2021年
For the purpose of promoting mechanical properties of bisphenol-A polycarbonate (PC) reinforced by rigid organic styrene-acrylonitrile copolymer (SAN) particles, styrene/acrylonitrile/glycidyl methacrylate terpolymer (SAG) was synthesized and applied as compatibilizer for PC/SAN blends. It is found that the phase morphology of PC/SAN/SAG blends is closely related with their mechanical properties. Large continuously distributed SAN phase or spherical dispersed SAN particles with average diameter over 2 μm tend to trigger premature tensile failure of blends due to stress concentration. The incorporation of SAG can simultaneously reinforce and toughen PC/SAN blends by controlling the size and distribuion of the dispersed SAN particles. For the blends with fixed PC/SAN ratio, the elongation at break and fracture energy are markedly improved when SAN domain size is reduced by adding appropriate amount of SAG. Typically, for blends with a PC/SAN ratio of 75/25, adding 3 wt.% SAG will cause the average diameter of SAN particles to reduce from 2.35 ± 1.20 μm to 0.74 ± 0.25 μm, meanwhile up to 95 % increment in elongation at break and 115 % increment in fracture energy is achieved.
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