PA6/PTFE blends with varying polytetrafluoroethylene content from 3% to 15%(mass fraction) were irradiated by 60Co gamma-ray with various doses(20,50 and 100 kGy) under ambient conditions.Moisture absorption test,U-no...PA6/PTFE blends with varying polytetrafluoroethylene content from 3% to 15%(mass fraction) were irradiated by 60Co gamma-ray with various doses(20,50 and 100 kGy) under ambient conditions.Moisture absorption test,U-notched Charpy impact test and quasi-static tension and bending were conducted to investigate the effect of irradiation on moisture absorption and mechanical properties of the blends.It is shown that the exposure of the blend to 60Co irradiation improves the tensile modulus,tensile strength and flexural modulus due to irradiation induced cross-linking in PA6 phase.However,the Charpy impact strength of the blends is much lower than that of the original PA6 and it decreases slightly with the increase of irradiation dose.Moreover,the flexural modulus increases to a maximum value and then decreases with further increasing the PTFE content,and the moisture absorption decreases with the increase of the PTFE content and irradiation dose.展开更多
The preparation process-dependent phase morphology of blends composed of nylon 6 and acrylonitrile-butadiene- styrene(ABS)over a composition range of 30-70 wt% using a styrene-maleic anhydride(SMA)copolymer as the com...The preparation process-dependent phase morphology of blends composed of nylon 6 and acrylonitrile-butadiene- styrene(ABS)over a composition range of 30-70 wt% using a styrene-maleic anhydride(SMA)copolymer as the compatibilizing agent with a constant content(5phr)was investigated.The results of the scanning electron microscope (SEM)observation revealed that compared with the binary blends of nylon 6 and ABS,the existence of SMA caused a composition shift of phase inversion to a higher weight fraction of ny...展开更多
应用Brabender挤出机制备ABS接枝物ABS g MAH,讨论了反应过程中温度、转速、单体MAH和引发剂DCP用量对接枝率的影响,并研究了接枝物对PA6/ABS合金的增容作用,用扫描电镜观察了分散相的微观形态。实验表明,在合适的温度下,转速为30r/min...应用Brabender挤出机制备ABS接枝物ABS g MAH,讨论了反应过程中温度、转速、单体MAH和引发剂DCP用量对接枝率的影响,并研究了接枝物对PA6/ABS合金的增容作用,用扫描电镜观察了分散相的微观形态。实验表明,在合适的温度下,转速为30r/min、DCP用量为1%、MAH用量为5%时,ABS g MAH的接枝率可达2 3%;PA6/ABS/ABS g MAH共混物配比为90∶8∶15时,合金的冲击韧性有较大提高,其它性能也有所改善。展开更多
基金Project(10772156) supported by the National Natural Science Foundation of ChinaProject supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry of China
文摘PA6/PTFE blends with varying polytetrafluoroethylene content from 3% to 15%(mass fraction) were irradiated by 60Co gamma-ray with various doses(20,50 and 100 kGy) under ambient conditions.Moisture absorption test,U-notched Charpy impact test and quasi-static tension and bending were conducted to investigate the effect of irradiation on moisture absorption and mechanical properties of the blends.It is shown that the exposure of the blend to 60Co irradiation improves the tensile modulus,tensile strength and flexural modulus due to irradiation induced cross-linking in PA6 phase.However,the Charpy impact strength of the blends is much lower than that of the original PA6 and it decreases slightly with the increase of irradiation dose.Moreover,the flexural modulus increases to a maximum value and then decreases with further increasing the PTFE content,and the moisture absorption decreases with the increase of the PTFE content and irradiation dose.
基金This work was supported by the National Science Funds for GuiZhou Province Science Projects(No.GY-2005-3036)the Special Funds for Major State Basic Research Projects(No.2005CB623802).
文摘The preparation process-dependent phase morphology of blends composed of nylon 6 and acrylonitrile-butadiene- styrene(ABS)over a composition range of 30-70 wt% using a styrene-maleic anhydride(SMA)copolymer as the compatibilizing agent with a constant content(5phr)was investigated.The results of the scanning electron microscope (SEM)observation revealed that compared with the binary blends of nylon 6 and ABS,the existence of SMA caused a composition shift of phase inversion to a higher weight fraction of ny...
文摘应用Brabender挤出机制备ABS接枝物ABS g MAH,讨论了反应过程中温度、转速、单体MAH和引发剂DCP用量对接枝率的影响,并研究了接枝物对PA6/ABS合金的增容作用,用扫描电镜观察了分散相的微观形态。实验表明,在合适的温度下,转速为30r/min、DCP用量为1%、MAH用量为5%时,ABS g MAH的接枝率可达2 3%;PA6/ABS/ABS g MAH共混物配比为90∶8∶15时,合金的冲击韧性有较大提高,其它性能也有所改善。
