SEBS/PP/TPEE共混材料非等温结晶动力学研究
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摘要
采用双螺杆挤出机制备了SEBS/PP/TPEE共混材料,利用差示扫描量热法(DSC)研究组分PP非等温结晶动力学,研究TPEE在组分PP结晶过程中的作用。结果表明:随着降温速率的增大,组分PP的结晶温度都向低温移动,且结晶峰变宽。TPEE既起阻碍PP分子链运动和排列的作用,降低PP的结晶度和熔点,又起成核剂的作用,降低PP结晶所需能量,提高PP的结晶温度和结晶速率。用Avrami法处理SEBS/PP/TPEE共混材料中组分PP的非等温结晶曲线,n值约为3,TPEE对组分PP起到了异相成核的作用。
The thermoplastic elastomer of SEBS/PP/TPEE blending materials are prepared by double screw extruder.The non-isothermal crystallization kinetics of them is studied by differential scanning calorimetry(DSC)and then the function of TPEE in the crystallization process of PP is discussed.The results show that with the increase of cooling rate,the crystallization temperature of PP moves to low temperature,and the crystallization peaks become wider.The TPEE not only hinders the alignment and movement of PP molecular chains,reduces the crystallinity and melting point of PP,but also acts as nucleating agent,reduces the energy for crystallization of PP and improves the crystallization temperature and crystallization rate of PP.The non-isothermal crystallization curves of SEBS/PP/TPEE blending materials are processed by Avrami method.The n values are all about 3.The TPEE plays the role of heterogeneous nucleation.
The thermoplastic elastomer of SEBS/PP/TPEE blending materials are prepared by double screw extruder.The non-isothermal crystallization kinetics of them is studied by differential scanning calorimetry(DSC)and then the function of TPEE in the crystallization process of PP is discussed.The results show that with the increase of cooling rate,the crystallization temperature of PP moves to low temperature,and the crystallization peaks become wider.The TPEE not only hinders the alignment and movement of PP molecular chains,reduces the crystallinity and melting point of PP,but also acts as nucleating agent,reduces the energy for crystallization of PP and improves the crystallization temperature and crystallization rate of PP.The non-isothermal crystallization curves of SEBS/PP/TPEE blending materials are processed by Avrami method.The n values are all about 3.The TPEE plays the role of heterogeneous nucleation.
引文
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[17]POLAT K,SEN M.Preparation and characterization of a thermoplastic proton-exchange system based on SEBS and polypropylene blends[J].Express Polymer Letters,2017,11(3):209.
[18]AK GUPTA,SN PURWAR.Crystallization of PP in PP/SEBSblends and its correlation with tensile properties[J].Journal of Applied Polymer Science,2010,29(5):1595~1609.
[19]梁胜,肖望东,戴文利.填料改性充油SEBS/PP共混材料的摩擦学和力学性能研究[J].塑料工业,2009(4):68~72.
[20]战双双,苑宾,牟晓娟,等.充油SEBS/PP热塑性弹性体的制备及性能研究[J].塑料科技,2015(1):46~50.
[21]蒙日亮,伍玉娇,何辉,等.PP/PA6/OMMT纳米复合材料的非等温结晶动力学[J].高分子材料科学与工程,2011(3):92~95,100
[22]倪卓,习雯影,杨松峰.山梨醇衍生物对聚乙烯结晶行为的影响[J].精细化工,2009,26(10):948~952,964
[23]倪卓,华文语,王应,等.PEEK/HA生物复合材料的结晶动力学[J].高分子材料科学与工程,2013,29(2):74~77.
[2]KHODABANDELOU M,RAZAVI AGHJEH M K,KHONAKDARH A,et al.Effect of localization of carbon nanotubes on fracture behavior of un-vulcanized and dynamically vulcanized PP/EPDM/MWCNT blend-nanocomposite[J].Composites Science and Technology,2017,149:134~148.
[3]张振江,唐涛,祝丽荔,等.长链支化聚丙烯结晶行为及发泡性能研究[J].高分子学报,2016,4:457~463.
[4]CAO D,FU ZF,LI CJ.Elctrospun fiber membranes of novel thermoplastic polyester elastomers:preparation and characterization[J].Polymer Science,2011,122(3):1698~1706.
[5]CALVERT P D,RYNA T G.Redistribution of impurities in crystallizing polymers[J].Polymer,1978,19(6):611~616.
[6]殷敬华,莫志深.现代高分子物理学[M].北京:科学出版社,2001:108~112.
[7]倪卓,牛柯,习雯影.成核剂1,3-2,4-二(3,4-二甲基)亚苄基木糖醇的合成及其对聚丙烯的改性[J].化工学报,2009,60(4):1028~1034.
[8]LIU S,YU Y,et al.Isothermal and non-isothermal crystallization kinetics of nylon-11[J].Journal of Applied Polymer Science,1998,70(12):2317~2380.
[9]ALLEGRA G,CORRADINI P,ELIAS H G,et al.Definitions of terms relating to crystalline Polymers[J].Puer and Applied Chemistry,1989,61(4):769~785.
[10]KISSINGER H E.Variation of peak temperature with heating rate in different thermal analysis[J].Journal of Research of the National Bureau of Standards,1955,57(4):217~221.
[11]秦艳分.PP/TPEE共混物的制备及其性能研究[D].杭州:浙江理工大学,2013.
[12]郭红革.聚丙烯/聚碳酸酯共混物的结构与性能研究[D].天津:天津大学,2005.
[13]杨华明,曹建红,胡岳华,等.PP/Talc复合材料的非等温结晶动力学[J].高分子材料科学与工程,2004,20(4):173~176.
[14]秦艳分,沈金科,周翔,等.相容剂对PP,TPEE共混物动态流变性能影响[J].纺织学报,2013,34(9):1~5.
[15]LEE J M,CHOI B H,M00N J S,et al.Determination of the thermoplastic of thermoplastic polyester elastomers(TPEEs)using essential work of fracture(EWF)test method[J].Polymer Testing,2009,122(3):1698~1706.
[16]倪卓,牛柯,陈丽朱,等.二亚(对乙基)苄基山梨醇对聚丙烯性能的影响[J].深圳大学学报理工版,2008,25(1):14~18.
[17]POLAT K,SEN M.Preparation and characterization of a thermoplastic proton-exchange system based on SEBS and polypropylene blends[J].Express Polymer Letters,2017,11(3):209.
[18]AK GUPTA,SN PURWAR.Crystallization of PP in PP/SEBSblends and its correlation with tensile properties[J].Journal of Applied Polymer Science,2010,29(5):1595~1609.
[19]梁胜,肖望东,戴文利.填料改性充油SEBS/PP共混材料的摩擦学和力学性能研究[J].塑料工业,2009(4):68~72.
[20]战双双,苑宾,牟晓娟,等.充油SEBS/PP热塑性弹性体的制备及性能研究[J].塑料科技,2015(1):46~50.
[21]蒙日亮,伍玉娇,何辉,等.PP/PA6/OMMT纳米复合材料的非等温结晶动力学[J].高分子材料科学与工程,2011(3):92~95,100
[22]倪卓,习雯影,杨松峰.山梨醇衍生物对聚乙烯结晶行为的影响[J].精细化工,2009,26(10):948~952,964
[23]倪卓,华文语,王应,等.PEEK/HA生物复合材料的结晶动力学[J].高分子材料科学与工程,2013,29(2):74~77.