动态交联PP/EVA共混物的制备与性能研究
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摘要
将动态交联技术应用于聚丙烯/乙烯醋酸乙烯共聚物(PP/EVA)共混体系中,制得动态交联PP/EVA共混物。采用Hakke转矩流变仪研究了动态交联对PP/EVA共混物共混时扭矩的影响;研究了过氧化二异丙苯(DCP)和EVA含量对共混物力学性能的影响;考察了动态交联共混物的维卡软化点。结果表明,加入DCP后,PP/EVA共混物扭矩先升后降,DCP的添加量为EVA含量的1%为宜。随着EVA用量的增加,动态交联EVA/PP共混物的冲击强度大幅提高,但拉伸强度有所降低。少量经动态交联的EVA颗粒可以促进共混物中PP的结晶,提高共混物的维卡软化点。
Blends of polypropylene(PP) and ethylene-vinyl acetate copolymer(EVA) were prepared via dynamic crosslinking method.The torque of PP/EVA blends was studied using a Hakke Rheometer.Influence of the content of DCP and EVA on mechanical properties and the Vicat temperature of dynamic crosslinked PP/EVA blends was investigated.It showed the torque of PP/EVA blends increased firstly and then decreased with increasing DCP,with the optimal content of DCP being 1 % based on EVA.The impact strength of the blends increased obviously,but tensile properties decrease slightly with increasing EVA content.The EVA particles in the blends promoted the crystallization of the PP,which increased the Vicat temperature.
Blends of polypropylene(PP) and ethylene-vinyl acetate copolymer(EVA) were prepared via dynamic crosslinking method.The torque of PP/EVA blends was studied using a Hakke Rheometer.Influence of the content of DCP and EVA on mechanical properties and the Vicat temperature of dynamic crosslinked PP/EVA blends was investigated.It showed the torque of PP/EVA blends increased firstly and then decreased with increasing DCP,with the optimal content of DCP being 1 % based on EVA.The impact strength of the blends increased obviously,but tensile properties decrease slightly with increasing EVA content.The EVA particles in the blends promoted the crystallization of the PP,which increased the Vicat temperature.
引文
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[13]周红波,王苓,王正有.PP/EVA/纳米CaCO3复合体系力学性能的研究[J].塑料工业,2011,39(5):68-70.Zhou Hongbo,Wang Ling,Wang Zhengyou.Research onMechanical Properties of PP/EVA/Nano-CaCO3[J].China Plastics Industry,2011,39(5):68-70.
[14]王川艳,苑会林.EVA交联机理的研究[J].合成材料老化与应用,2011,40(5):7-11.Wang Chuanyan,Yuan Huilin.The Research of EVACross-linking Mechanism[J].Synthetic Materials Agingand Application,2011,40(5):7-11
[2]Meligi G,Yoshii F,Sasaki T,et al.Accelerated Degrad-ability of Polypropylene by Blended Rubber[J].PolymerDegradation and Stability,1997,57:241-246.
[3]Sun Y S,Zhang Z M,Fu Z L.Toughening Mechanismsof Polypropylene Blends Modified by Elastomer[J].Chi-nese Science Abstract Series B,1995,14:11.
[4]Arroyo M,Zitzumbo R,Avalos F.Composites Based onPP/EPDM Blends and Aramid Short Fibres.Morphology/Behaviour Relationship[J].Polymer,2000,16:6351-6359.
[5]Yu ZZ,Lei M,Ou YC.Study on Compatibilization andToughening of a Copolyester with a Maleated Thermoplas-tic Elastomer[J].Polymer,2002,25:6393-7001.
[6]Naskar K,Noordermeer J M.Influence of Various Perox-ides in PP/EPDM Thermoplastic Vulcanizates at VariedBlend Ratios[J].Journal of Elastomers and Plastics,2006,38(2):163-180.
[7]Jain A K,Nagpal A K,Singhal R,Effect of DynamicalCrosslinking on Impact Strength and Other MechanicalProperties of Polypropylene/Ethylene-propylene-dieneRubber Blends[J].Journal of Applied Polymer Science,2000,78(12):2089-2103.
[8]Liu X,Huang H,Xie Z Y,et al.EPDM/Polyamide TPVCompatibilized by Chlorinated Polyethylene[J].PolymerTesting,2003,22(1):9-16.
[9]殷锦捷,屈晓莉.EVA对PP/EVA共混物力学性能的影响[J].塑料科技,2007,35(1):32-34.Yin Jinjie,Qu Xiaoli.Effects of EVA on MechanicalProperties of PP/EVA Blends[J].Plastics Science andTechnology,2007,35(1):32-34.
[10]Gupta A K,Ratnam B K,Srinivasan K R.Melt-rheolog-ical Properties of PP/EVA Blend[J].Journal of AppliedPolymer Science,1992,46(2):281-293.
[11]严玉蓉,赵耀明,李瑞霞,等.PP/EVA/沸石共混体系流变性能研究[J].合成树脂及塑料,2002,19(3):9-12.Yan Yurong,Zhao Yaoming,Li Ruixia,et al.Study onRheology of Polypropylene/Ethylene-vinyl Acetate/Zeo-lite Blend[J].China Synthetic Resin and Plastics,2002,19(3):9-12.
[12]Kolarik J,Jancar J.Ternary Composites of Polypropyl-ene/Elastomer/Calcium Carbonate:Effect of Functional-ized Components on Phase Structure and Mechanical[J].Polymer,1992,(23):49-61.
[13]周红波,王苓,王正有.PP/EVA/纳米CaCO3复合体系力学性能的研究[J].塑料工业,2011,39(5):68-70.Zhou Hongbo,Wang Ling,Wang Zhengyou.Research onMechanical Properties of PP/EVA/Nano-CaCO3[J].China Plastics Industry,2011,39(5):68-70.
[14]王川艳,苑会林.EVA交联机理的研究[J].合成材料老化与应用,2011,40(5):7-11.Wang Chuanyan,Yuan Huilin.The Research of EVACross-linking Mechanism[J].Synthetic Materials Agingand Application,2011,40(5):7-11