金属离子配位作用下PA6的受限结晶

Study on Confined Crystallization of PA6 under Metal Ions Coordination

采用熔融共混法,制备了聚酰胺6/氯化钙(PA6/CaCl2)复合材料。通过差示扫描量热法(DSC)、X射线衍射法(XRD)研究了PA6基体在受限条件下的非等温结晶及晶型转变行为。结果表明:金属离子Ca2+与酰胺基团的络合配位作用使PA6/CaCl2复合材料中PA6的结晶行为和结晶度受到了限制。随着CaCl2含量的增加,PA6的结晶度、结晶峰温度、熔融峰温度逐渐降低,结晶速率减小,结晶半峰宽增大,当CaCl2的含量大于8%时,PA6变为无定形态;此外,CaCl2的引入有利于PA6中α晶的生成。

Polyamide 6/calcium chloride（PA6/CaCl2） composites were prepared through melting extrusion process,the crystallization behavior and crystal structures of PA6/CaCl2 composites were studied by differential scanning calorimeter（DSC） and X-ray diffractometer（XRD）.The results show that： the CaCl2 in PA6 can destroy the hydrogen bond and change the crystal structures and crystallization behavior of PA6.With the increase of CaCl2 content,the crystallization temperature,crystallinity and crystallization rate of PA6 decrease.Moreover,the confined condition is in favor of forming α-crystal.When the CaCl2content is up to 8%,the PA6 changes from crystal phase into amorphous phase.