摘要
采用差示扫描量热仪、偏光显微镜和X射线衍射仪等研究了透明成核剂和透明聚丙烯的结晶行为和结晶形态。结果表明：山梨醇类透明成核剂第二次升温比第一次升温熔融温度下降10-50℃，熔融焓下降50%~90%；纯聚丙烯结晶温度约为110℃，熔融温度约为152℃，球晶尺寸约50μm，晶型为α晶；加入透明成核剂后，聚丙烯的结晶温度升高约10℃，熔融温度升高约3℃，晶粒尺寸约1μm，晶型仍为α晶。
The crystallization behavior and morphology of transparent nucleating agents and transparent polypropylenes were studied by differential scanning calorimetry （DSC）, polarized light microscopy （PLM） and X-ray diffraction （XRD）. The results indicate that the melting temperature of sorbitol nucleating agents decreases by 10-50 ℃ at the second heating up with the melting enthalpy decreasing by 50%-90% in comparison with those at the first heating up. The crystallization temperature, melting temperature of neat polypropylene is about 110, 152 ℃, respectively and the crystal structure is α form with spherulite size of approximately 50 μm. After adding the transparent nucleating agent, the crystallization temperature, melting temperature of polypropylene increases about 10, 3 ℃, respectively and the crystal structure is still α form with grain size deceasing to about 1 μm.
出处
《合成树脂及塑料》
CAS
北大核心
2014年第2期65-67,共3页
China Synthetic Resin and Plastics
关键词
透明聚丙烯
透明成核剂
结晶行为
结晶形态
trasparent polypropylene
transparent nucleating agent
crystallization behavior
crystallization morphology
