Firstly,polypropylene (PP)/thermoplastic vulcanizate (TPV) binary blend was prepared by melt blending,and then added nano-CaCO3 to prepare its ternary blend.The effect of amount of TPV on the mechanical properties and micro-morphology of PP/TPV binary blends was studied.And the effect of amount of nano-CaCO3 on the mechanical properties,micro-morphology,heat resistance and crystal form of PP/TPV/nano-CaCO3 ternary blends was also studied.The results showed that TPV can effectively toughen PP.When the amount of TPV was only 5 parts,the impact strength of PP/TPV binary blend reached 8.2kJ/m2,which was an increase of 95% compared with PP.The tensile strength only decreased 4%.Nano-CaCO3 can induce the formation of β crystal form in PP.As the amount of nano-CaCO3 in the PP/TPV/nano-CaCO3 ternary blend increased,the notched impact strength showed a trend of first increasing and then decreasing,and the tensile strength changed little.When the amount of nano-CaCO3 was 3 parts,the impact resistance of the material was the best,and the heat resistance was also improved,which can be used in automotive,construction and other industries.
[1] Ke F Y,Jiang X W,Xu H Y,et al.Ternary nano-CaCO3/poly(ethylene terephthalate) fiber/polypropylene composites:increased impact strength and reinforcing mechanism[J].Composites Science and Technology,2012,72(5):574-579.
[2] 王莹,王扬丹,彭履瑶,等.SEBS、纳米SiO2协同作用改性PP的研究[J].化工新型材料,2014,42(12):214-216.
[3] 张博文,刘喜军,王宇威,等.乙丙嵌段共聚物改性PP/EPR共混物[J].工程塑料应用,2020,48(2):13-18.
[4] 王芳,朱旭,王忠强,等.纳米CaCO3对动态硫化三元乙丙橡胶/聚丙烯复合材料的性能影响[J].塑料工业,2017,45(6):89-92.
[5] 冯再,张继忠,陈宝书.PP/SBS复合材料共混改性及性能研究[J].化工新型材料,2014,42(9):64-66.
[6] 敖玉辉,周梦思,冯芳.不同弹性体增韧聚丙烯的研究[J].化工新型材料,2014,42(3):189-190.
[7] Ma C G,Mai Y L,Rong M Z,et al.Phase structure and mechanical properties of ternary polypropylene/elastomer/nano-CaCO3 composites[J].Composites Science & Technology,2007,67(14):2997-3005.
[8] Liang J Z,Li R K Y.Rubber toughening in polypropylene:a review[J].Journal of Applied Polymer Science,2000,77:409-417.
[9] Peng H,Lu M,Wang H,et al.Comprehensively improved mechanical properties of silane crosslinked polypropylene/ethylene propylene diene monomer elastomer blends[J].Polymer Engineering & Science,2020,60(5):1054-1065.
[10] Dao K C.Mechanical properties of polypropylene/crosslinked rubber blends[J].Journal of Applied Polymer Science,1982,27(12):4799-4806.
[11] Zhao Y S,Liu Z W,Su B,et al.Property enhancement of PP-EPDM thermoplastic vulcanizates via shear-induced break-up of nano-rubber aggregates and molecular orientation of the matrix[J].Polymer,2015,63:170-178.
[12] Wu H G,Tian M,Zhang L Q,et al.New understanding of morphology evolution of thermoplastic vulcanizate (TPV) during dynamic vulcanization[J].ACS Sustainable Chemistry & Engineering,2015,3(1):26-32.
[13] Wu H G,Tian M,Zhang L Q,et al.Effect of rubber nanoparticle agglomeration on properties of thermoplastic vulcanizates during dynamic vulcanization[J].Polymers,2016,8(4):127.
[14] 李丽,李延亮,许平,等.α、β晶型成核剂在高抗冲共聚PP中的应用[J].合成树脂及塑料,2007,24(5):39-42.
[15] 石璞,陈浪,钟苗苗,等.高组分纳米碳酸钙填充聚丙烯及增韧机理[J].高分子材料科学与工程,2015,31(10):69-74.
[16] Wu H Y,Li X X,Chen J W,et al.Reinforcement and toughening of polypropylene/organic montmorillonite nanocomposite using β-nucleating agent and annealing[J].Composites Part B:Engineering,2013,44(1):439-445.
[17] 成江,章峻,胡柏星,等.碳酸钙级配填充聚丙烯结晶形态的XRD研究[J].中国塑料,2001,15(6):60-62.
[18] 肖文昌.β晶型聚丙烯的结晶行为及结晶动力学[D].上海:复旦大学,2009.
基金资助
国家自然科学基金(51173072)
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