摘要
采用微乳液作为成核剂载体将苯甲酸钠加入聚丙烯,研究其对聚丙烯力学性能及结晶行为的影响。将成核剂苯甲酸钠溶解于水中作为水相,与油相Marcol-52、表面活性剂吐温60和助表面活性剂正己醇共混,制备了一种含有苯甲酸钠成核剂的微乳液。将苯甲酸钠微乳液和成核剂粉末分别加入聚丙烯中熔融共混后测试。力学性能、小角X射线散射、偏光显微镜及差示扫描量热仪等结果表明,与苯甲酸钠粉末比较,采用微乳液法将成核剂分散到聚丙烯中,能够使聚丙烯获得更高的取向度、弯曲弹性模量和弯曲强度,而且成核剂能在聚丙烯结晶过程中产生更多的晶核,提高了聚丙烯的结晶度。
The effect of sodium benzoate(SB)nucleating agent using microemulsion as nano-vehicle on the mechanical properties and crystallization behavior of polypropylene was studied. SB was solubilized by adding predetermined amount of water, mineral oil, 1-hexanol and Tween 60 dropwise to obtain a single-phase microemulsion.Both SB microemulsion and SB powder were used for PP modification through melt compounding. The results of mechanical properties, small angle X-ray scattering(SAXS), polarizing microscope(POM)and DSC show that the microemulsion method can improve the dispersion of nucleating agent and the orientation of PP. The flexural strength and moduli of PP modified with SB microemulsion are much higher than those of PP modified with SB powder using conventional mixing method. More crystal nuclei can be formed during the crystallization of PP and the crystallinity of PP is further increased when SB was loaded by microemulsion method compared with used in powder form.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第4期132-138,共7页
Polymer Materials Science & Engineering
关键词
聚丙烯
苯甲酸钠
微乳液
力学性能
结晶
polypropylene
sodium benzoate
microemulsion
mechanical properties
crystallization
