Poly[bis(phenoxyphosphazene)](PBPP) and magnesium hydroxide(MH) are used as a flame retardant blend with low-density polyethylene(LDPE) for the nuclear cable. This study aims to investigate the effects of PBPP in MH-L...Poly[bis(phenoxyphosphazene)](PBPP) and magnesium hydroxide(MH) are used as a flame retardant blend with low-density polyethylene(LDPE) for the nuclear cable. This study aims to investigate the effects of PBPP in MH-LDPE blend composites on flame retardance and electron beam irradiation. The structure, morphology,and properties of the blend composites irradiated by an electron beam to different absorbed doses were characterized. The results indicated that PBPP provides lubrication during processing. As the PBPP content in the blend increases the melt flow rate at 20 phr MH, meaning the material is easier to process. The higher the PBPP content, the higher the limiting-oxygen index. The elongation at the break of the PBPP containing composites(at 50 phr MH) was evidently higher than the non-PBPP ones at different absorbed doses by electron beam irradiation. The thermogravimetric analysis results indicated that the improved mechanical property, resulting from electron-beam irradiation, could be attributed to the consumption of PBPP.展开更多
The compatibility and crystallization structure of HDPE/EPO(high density polyethylene/ethylenepropyleneoctene1 copolymer)blends were studied by differential scanning calorimetry(DSC)and wideangle Xray diffra...The compatibility and crystallization structure of HDPE/EPO(high density polyethylene/ethylenepropyleneoctene1 copolymer)blends were studied by differential scanning calorimetry(DSC)and wideangle Xray diffraction(WAXD)methods.Only a single melting or cooling peak was found in DSC curves for all blends,showing cocrystalline in patchcrystal level.The crystallinity,crystal parameter and crystallitesize of the blends which were calculated by WAXD method wee independent of the composition of the blends,further revealing the compatibility of the system.展开更多
基金Supported by the"Strategic Priority Research Program"of the Chinese Academy of Sciences(No.XDA02040300)
文摘Poly[bis(phenoxyphosphazene)](PBPP) and magnesium hydroxide(MH) are used as a flame retardant blend with low-density polyethylene(LDPE) for the nuclear cable. This study aims to investigate the effects of PBPP in MH-LDPE blend composites on flame retardance and electron beam irradiation. The structure, morphology,and properties of the blend composites irradiated by an electron beam to different absorbed doses were characterized. The results indicated that PBPP provides lubrication during processing. As the PBPP content in the blend increases the melt flow rate at 20 phr MH, meaning the material is easier to process. The higher the PBPP content, the higher the limiting-oxygen index. The elongation at the break of the PBPP containing composites(at 50 phr MH) was evidently higher than the non-PBPP ones at different absorbed doses by electron beam irradiation. The thermogravimetric analysis results indicated that the improved mechanical property, resulting from electron-beam irradiation, could be attributed to the consumption of PBPP.
文摘The compatibility and crystallization structure of HDPE/EPO(high density polyethylene/ethylenepropyleneoctene1 copolymer)blends were studied by differential scanning calorimetry(DSC)and wideangle Xray diffraction(WAXD)methods.Only a single melting or cooling peak was found in DSC curves for all blends,showing cocrystalline in patchcrystal level.The crystallinity,crystal parameter and crystallitesize of the blends which were calculated by WAXD method wee independent of the composition of the blends,further revealing the compatibility of the system.
