摘要
以二甲苯作为溶剂、聚丙烯(PP)作为基体、月桂改性的碱式硫酸镁晶须(MOSw)作为填料,采用溶液共混法制备了一系列碱式硫酸镁晶须/聚丙烯(PP/MOSw)复合材料。力学性能测试结果表明:当MOSw添加量小于5%(质量分数,下同)时,复合材料的拉伸强度、屈服强度及冲击强度均有明显提升。随着MOSw添加量的进一步增大,PP/MOSw复合材料的拉伸强度和屈服强度反而下降,但仍然优于相同添加量的熔融共混法样品。断面扫描电镜(SEM)结果表明:当MOSw添加量小于5%时,其分散较为均匀;当MOSw添加量较大时,其在基体中易发生团聚,且团聚体与基体之间的相容性差。此外,还采用Turcsányi方程定量计算了填料与基体之间的界面相互作用,结果同样表明:当MOSw添加量小于5%时,晶须与基体之间的界面相互作用较强;随着MOSw添加量的增大,晶须与基体之间的界面相互作用减弱。
Aseries of polypropylene/magnesium oxysulfate whisker(PP/MOSw)composites were prepared via solution blending method,using xylene as solvent,PP resin as matrix and lauric acid modified MOSw as filler.Mechanical property tests showed that the tensile strength,yield strength and impact strength were all greatly increased when the amount of MOSw was less than 5wt%.With the further increase of MOSw content,the tensile strength and yield strength of PP/MOSw composites turned to decline,but still greater than those of composites prepared via melt blending method.The SEM analyses of fracture surface implied that less than 5wt%amount of MOSw was well-dispersed.However,great amount of MOSw easily led to aggregating and had poor compatibility with PP matrix.Besides,Turcsányi equation was used to quantitative calculate the interfacial interaction between MOSw and PP matrix.The results also confirmed that less than 5wt%amount of MOSw led to stronger interfacial interaction.With the increase of MOSw content,the interfacial interaction instead became weaker.
作者
党力
李宛琴
吕智慧
胡杰林
次旺拉姆
刘威
DANG Li;LI Wanqin;LYU Zhihui;HU Jielin;CIWANG Lamu;LIU Wei(School of Chemical Engineering,Qinghai University,Xining 810016)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第18期3135-3139,共5页
Materials Reports
基金
国家自然科学基金(21868030)
青海大学博士科研启动基金(4106040151)~~
关键词
溶液共混法
碱式硫酸镁晶须
聚丙烯
界面相互作用
solution blending method
magnesium oxysulfate whisker
polypropylene
interfacial interaction
