连续玻纤增强HDPE复合材料的结晶动力学
|
摘要
采用差示扫描量热(DSC)法分析了不同降温速率下高密度聚乙烯(HDPE)和连续玻纤(GF)增强HDPE复合材料的非等温结晶和熔融行为。使用莫志深法对HDPE和HDPE/GF复合材料的非等温结晶动力学进行研究,得出莫氏方程可以描述其非等温结晶动力学过程。并且采用偏光显微镜(POM)观察结晶形态。结果显示:降温速率越大,聚合物结晶峰越宽、聚合物开始结晶时的温度越低、结晶峰温度越低。GF起到异相成核的作用,使得HDPE/GF复合材料的成核速率高于纯HDPE,但由于纤维对晶体生长具有一定的阻碍作用,使其结晶焓较低。通过熔融曲线分析发现,降温速率和GF的加入对HDPE及HDPE/GF复合材料熔融温度和熔融峰温度的影响并不显著。采用莫志深法的研究结果与由动力学参数得出的结论相一致,HDPE/GF复合材料比HDPE更易结晶。POM等温结晶观察结果表明,HDPE/GF复合材料比HDPE的结晶速率更快,这与DSC和莫志深方程结果一致。
Non-isothermal crystallization and melting behavior of High-density polyethylene(HDPE) and continuous glass fiber(GF) reinforced HDPE composites at different cooling rates were investigated by differential scanning calorimeter(DSC).The non-isothermal crystallization kinetics of HDPE and HDPE/GF composites were studied by Mo Zhishen method.The Mohs method can be used to describe the non-isothermal crystallization kinetics.The crystalline morphology was observed by a polarizing microscope(POM).The results show that the higher the cooling rate,the wider the crystallization peak of the polymer,the lower the temperature at which the polymer begins to crystallize,and the lower the temperature of the crystallization peak.GF plays the role of heterogeneous nucleation,making the nucleation rate of HDPE/GF composite higher than that of pure HDPE,but the fiber has a certain hindrance effect on crystal growth,making its crystallization enthalpy lower.The melting curve analysis showes that the melting temperature and melting peak temperature of HDPE and HDPE/GF composites are not significantly affected by the cooling rate and the addition of GF.The results obtain by Mozishen method are consistent with those obtained by kinetic parameters.HDPE/GF composites are easier to crystallize than HDPE composites.The results of the Mo Zhishen method were consistent with the conclusions obtained from the kinetic parameters.The HDPE/GF composites were more susceptible to crystallization than HDPE.The results of POM isothermal crystallization observation show that the crystallization rate of HDPE/GF composite is faster than that of HDPE,which is consistent with DSC and Mozishen equation.
Non-isothermal crystallization and melting behavior of High-density polyethylene(HDPE) and continuous glass fiber(GF) reinforced HDPE composites at different cooling rates were investigated by differential scanning calorimeter(DSC).The non-isothermal crystallization kinetics of HDPE and HDPE/GF composites were studied by Mo Zhishen method.The Mohs method can be used to describe the non-isothermal crystallization kinetics.The crystalline morphology was observed by a polarizing microscope(POM).The results show that the higher the cooling rate,the wider the crystallization peak of the polymer,the lower the temperature at which the polymer begins to crystallize,and the lower the temperature of the crystallization peak.GF plays the role of heterogeneous nucleation,making the nucleation rate of HDPE/GF composite higher than that of pure HDPE,but the fiber has a certain hindrance effect on crystal growth,making its crystallization enthalpy lower.The melting curve analysis showes that the melting temperature and melting peak temperature of HDPE and HDPE/GF composites are not significantly affected by the cooling rate and the addition of GF.The results obtain by Mozishen method are consistent with those obtained by kinetic parameters.HDPE/GF composites are easier to crystallize than HDPE composites.The results of the Mo Zhishen method were consistent with the conclusions obtained from the kinetic parameters.The HDPE/GF composites were more susceptible to crystallization than HDPE.The results of POM isothermal crystallization observation show that the crystallization rate of HDPE/GF composite is faster than that of HDPE,which is consistent with DSC and Mozishen equation.
引文
[1]Kaya E,Mathias L J.Investigation of melting behaviors and crystallinity of linear polyamide with high-aliphatic content[J].Journal of Applied Polymer Science,2012,123(1):92-98.
[2]吴进雪.连续玻纤增强聚烯烃复合材料的制备与性能研究[D].淄博:山东理工大学,2018.
[3]莫志深.一种研究聚合物非等温结晶动力学的方法[J].高分子学报,2008,1(7):656-661.
[4]Jape S P,Deshpande V D.Nonisothermal crystallization kinetics of nylon 66/LCP blends[J].Thermochimica Acta,2017,655:1-12.
[5]Hsu C Y,Yang T C,Wu T L,et al.The influence of bamboo fiber content on the non-isothermal crystallization kinetics of bamboo fiber-reinforced polypropylene composites(BPCs)[J].Holzforschung,2018,72(4):329-336.
[6]Ye D Z,Zhang X,Gu S,et al.Non-isothermal crystallization kinetics of eucalyptus lignosulfonate/polyvinyl alcohol composite[J].International Journal of Biological Macromolecules,2017,97:249-257.
[7]刘国刚,马伊,梁文斌,等.长玻纤增强聚丙烯复合材料性能研究[J].塑料科技,2017,45(10):25-29.
[8]李新中,余鼎声,徐日炜,等.HDPE/GF的力学性能及非等温结晶行为研究[J].塑料工业,2005,33(10):44-46.
[9]丁雪佳,李新中,王璧.玻纤对HDPE非等温结晶行为和动态力学性能的影响研究[J].塑料,2007(1):62-65,46.
[10]Deshmukh G S,Peshwe D R,Pathak S U,et al.Nonisothermal crystallization kinetics and melting behavior of poly(butylene terephthalate)and calcium carbonate nanocomposites[J].Thermochimica Acta,2015,606:66-76.
[11]任伊锦,陈琳芝,张军.LLDPE和HDPE的非等温结晶动力学[J].合成树脂及塑料,2018,35(3):38-43.
[12]Zhang Z,Feng L,Li Y,et al.Nonisothermal crystallization kinetics of poly(butylene terephthalate)/poly(ethylene terephthalate)/glass fiber composites[J].Polymer Composites,2015,36(3):510-516.
[13]高光辉,李卫华,颜德岳.尼龙1218的等温及非等温结晶动力学研究[J].高分子学报,2004,1(4):465-470.
[14]Frihi D,Layachi A,Gherib S,et al.Crystallization of glassfiber-reinforced polyamide 66 composites:Influence of glass-fiber content and cooling rate[J].Composites Science&Technology,2016,130:70-77.
[15]谢普,于杰,秦军,等.HDPE/GN非等温结晶动力学研究[J].炭素技术,2010,29(5):15-19.
[2]吴进雪.连续玻纤增强聚烯烃复合材料的制备与性能研究[D].淄博:山东理工大学,2018.
[3]莫志深.一种研究聚合物非等温结晶动力学的方法[J].高分子学报,2008,1(7):656-661.
[4]Jape S P,Deshpande V D.Nonisothermal crystallization kinetics of nylon 66/LCP blends[J].Thermochimica Acta,2017,655:1-12.
[5]Hsu C Y,Yang T C,Wu T L,et al.The influence of bamboo fiber content on the non-isothermal crystallization kinetics of bamboo fiber-reinforced polypropylene composites(BPCs)[J].Holzforschung,2018,72(4):329-336.
[6]Ye D Z,Zhang X,Gu S,et al.Non-isothermal crystallization kinetics of eucalyptus lignosulfonate/polyvinyl alcohol composite[J].International Journal of Biological Macromolecules,2017,97:249-257.
[7]刘国刚,马伊,梁文斌,等.长玻纤增强聚丙烯复合材料性能研究[J].塑料科技,2017,45(10):25-29.
[8]李新中,余鼎声,徐日炜,等.HDPE/GF的力学性能及非等温结晶行为研究[J].塑料工业,2005,33(10):44-46.
[9]丁雪佳,李新中,王璧.玻纤对HDPE非等温结晶行为和动态力学性能的影响研究[J].塑料,2007(1):62-65,46.
[10]Deshmukh G S,Peshwe D R,Pathak S U,et al.Nonisothermal crystallization kinetics and melting behavior of poly(butylene terephthalate)and calcium carbonate nanocomposites[J].Thermochimica Acta,2015,606:66-76.
[11]任伊锦,陈琳芝,张军.LLDPE和HDPE的非等温结晶动力学[J].合成树脂及塑料,2018,35(3):38-43.
[12]Zhang Z,Feng L,Li Y,et al.Nonisothermal crystallization kinetics of poly(butylene terephthalate)/poly(ethylene terephthalate)/glass fiber composites[J].Polymer Composites,2015,36(3):510-516.
[13]高光辉,李卫华,颜德岳.尼龙1218的等温及非等温结晶动力学研究[J].高分子学报,2004,1(4):465-470.
[14]Frihi D,Layachi A,Gherib S,et al.Crystallization of glassfiber-reinforced polyamide 66 composites:Influence of glass-fiber content and cooling rate[J].Composites Science&Technology,2016,130:70-77.
[15]谢普,于杰,秦军,等.HDPE/GN非等温结晶动力学研究[J].炭素技术,2010,29(5):15-19.