PP/MWNT复合材料的力学性能研究
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摘要
采用熔融共混法制备了不同质量分数的聚丙烯/多壁碳纳米管(PP/MWNT)复合材料,研究了MWNT的含量对复合材料的拉伸强度、冲击强度等力学性能以及储能模量的影响,并利用扫描电镜研究了复合材料的微观形貌。结果显示,MWNT的质量分数为1.5%时,复合材料的拉伸强度由28.58MPa提高到32.47MPa,冲击强度由5.67kJ/m~2提高到8.85 kJ/m~2,断裂伸长率呈下降趋势,复合材料的储能模量在MWNT为2%时出现最大值;SEM图像显示MWNT的含量较低时,在PP基体中分布均匀,当MWNT的含量增大后,在PP基体中产生了缠结,形成了团聚,导致PP/MWNT复合材料的力学性能有所下降。
In this paper,different mass fraction of polypropylene/multi-walled carbon nanotubes( PP/MWNT) composites were prepared by melt blending,the effects of MWNT content on mechanical properties and Energy storage modulus of composites were studied,and the microstructure of the composites was studied by SEM. The results showed that the tensile strength was increased from 28. 58 MPa to 32. 47 MPa,and the impact strength from 5. 67 kJ/m~2 to 8. 85 kJ/m~2 when the mass fraction of MWNT was 1. 5%,but the elongation of fracture was decreased. The energy storage modulus of the composites reached maximum when the MWNT content was 2%,the SEM images showed that the MWNT content was low and distributed evenly in PP matrix,when the MWNT content was increased,entanglement occurs in PP Matrix,which leadled to the decrease of mechanical properties of PP/MWNT composites.
In this paper,different mass fraction of polypropylene/multi-walled carbon nanotubes( PP/MWNT) composites were prepared by melt blending,the effects of MWNT content on mechanical properties and Energy storage modulus of composites were studied,and the microstructure of the composites was studied by SEM. The results showed that the tensile strength was increased from 28. 58 MPa to 32. 47 MPa,and the impact strength from 5. 67 kJ/m~2 to 8. 85 kJ/m~2 when the mass fraction of MWNT was 1. 5%,but the elongation of fracture was decreased. The energy storage modulus of the composites reached maximum when the MWNT content was 2%,the SEM images showed that the MWNT content was low and distributed evenly in PP matrix,when the MWNT content was increased,entanglement occurs in PP Matrix,which leadled to the decrease of mechanical properties of PP/MWNT composites.
引文
[1]邹恩广.聚丙烯复合材料的制备及性能研究[D].大庆:东北石油大学,2011.
[2]辛菲,王向东,许国志,等.多壁碳纳米管对聚丙烯膨胀阻燃体系阻燃性能的影响[J].塑料,2012(04):64-97.
[3]林志丹,黄珍珍,麦堪成.改性纳米Ca CO3/PP动态力学性能的研究[J].塑料,2003,32(4):6-10.
[4]SREEKUMAR T V,LIU T,MIN B G,et al.Polyacrylonitrile single-walled carbon nanotube composite fibers[J].Adv Mater,2004,16(1):58-61.
[5]KUMAR S,DANG T D,ARNOLD F E,et al.Synthesis,structure,and properties of PBO/SWNT composites[J].Macromolecules,2002,35(24):9039-9043.
[6]李姜,文明,李家丽,等.聚丙烯/碳纳米管微层挤出材料结构与性能[J].武汉理工大学学报,2009,21:56-65.
[7]陈燕,张慧勤.多壁碳纳米管/聚丙烯复合材料的微观结构及结晶性能研究[J].河南工业大学学报(自然科学版),2007(04):81-83.
[8]王建立,熊国平,顾明,等.多壁碳纳米管/聚丙烯复合材料热导率研究[J].物理学报,2009,58(7):4536-4541.
[9]王俊,王平华,唐龙祥,等.PP/碳纳米管复合材料的制备及电性能[J].高分子材料科学与工程,2011,27(1):138-141.
[10]姚忠亮,曹宁宁,郑玉婴,等.聚丙烯/多壁碳纳米管复合材料的制备与性能研究[J].中国塑料,2017,31(7):40-47.
[11]KON H,CAO C,YAN D.Controlled functionalization of multi-walled carbon nanotubes by in situ atom transfer radical polymerization[J].J Am Chem Soc,2004,126:421-423.
[2]辛菲,王向东,许国志,等.多壁碳纳米管对聚丙烯膨胀阻燃体系阻燃性能的影响[J].塑料,2012(04):64-97.
[3]林志丹,黄珍珍,麦堪成.改性纳米Ca CO3/PP动态力学性能的研究[J].塑料,2003,32(4):6-10.
[4]SREEKUMAR T V,LIU T,MIN B G,et al.Polyacrylonitrile single-walled carbon nanotube composite fibers[J].Adv Mater,2004,16(1):58-61.
[5]KUMAR S,DANG T D,ARNOLD F E,et al.Synthesis,structure,and properties of PBO/SWNT composites[J].Macromolecules,2002,35(24):9039-9043.
[6]李姜,文明,李家丽,等.聚丙烯/碳纳米管微层挤出材料结构与性能[J].武汉理工大学学报,2009,21:56-65.
[7]陈燕,张慧勤.多壁碳纳米管/聚丙烯复合材料的微观结构及结晶性能研究[J].河南工业大学学报(自然科学版),2007(04):81-83.
[8]王建立,熊国平,顾明,等.多壁碳纳米管/聚丙烯复合材料热导率研究[J].物理学报,2009,58(7):4536-4541.
[9]王俊,王平华,唐龙祥,等.PP/碳纳米管复合材料的制备及电性能[J].高分子材料科学与工程,2011,27(1):138-141.
[10]姚忠亮,曹宁宁,郑玉婴,等.聚丙烯/多壁碳纳米管复合材料的制备与性能研究[J].中国塑料,2017,31(7):40-47.
[11]KON H,CAO C,YAN D.Controlled functionalization of multi-walled carbon nanotubes by in situ atom transfer radical polymerization[J].J Am Chem Soc,2004,126:421-423.