摘要
研究了一种β成核剂(CHB-5)的含量对等规聚丙烯(iPP)结晶性能和力学性能的影响。用广角X射线衍射(WAXD)研究CHB-5诱导iPP晶型的变化,用差示扫描量热法(DSC)分析CHB-5对iPP熔融行为和结晶行为的影响,用偏光显微镜(POM)观察CHB-5诱导iPP结晶形态的变化。结果表明,CHB-5的加入使iPP的成核能力增强;CHB-5可降低iPP的熔融温度,提高其结晶温度和结晶起始温度,加快结晶速率;CHB-5能降低球晶尺寸;CHB-5的加入可使iPP缺口冲击强度提高。
The effect of a kind of βnucleating agent （ CHB-5） content on crystallization properties and mechani-cal properties of isotactic polypropylene （ iPP ） was studied.The influence of iPP induced by CHB -5 were re-searched by means of wide angle X ray diffraction （ WAXD）、differential scanning calorimetry （ DSC）、polarizing opti-cal microscope （ POM）.The change of the crystal structure was studied by using the WAXD;The melting behavior and crystallization behavior was researched by using the DSC;The crystalline form was discussed by using POM.As a result ,with the addition of CHB -5,nucleated iPP showed a larger nuclear capability ,a higher crystallization tempera-ture and initial crystallization temperature ,a faster crystallization rate.The melting temperature was decreased and the spherulites of nucleated iPP became small.Meanwhile ,the impact strength of nucleated iPP appeared increase.
出处
《合成材料老化与应用》
2014年第1期41-45,共5页
Synthetic Materials Aging and Application
关键词
等规聚丙稀
Β成核剂
Β晶型
结晶行为
isotactic polypropylene
βnucleating agent
βcrystal
crystallization behavior
