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利用差示扫描量热分析(DSC)方法研究了超高分子量聚乙烯(UHMWPE),硅烷交联UHMWPE的非等温结晶动力学。通过Jeziorny法和Mo法分别对非等温结晶过程进行处理,结果表明:硅烷交联UHMWPE分子链之间形成的三维网状结构抑制了分子链及链段之间的相对运动,阻碍了分子链的规则排列,影响了链段在晶区扩散迁移规整排列的速度,使结晶速率变慢,对晶体生长产生抑制作用。但在所有的结晶速率下,试样的Avrami指数n的值均在1.6～2.0之间,说明交联对UHMWPE的结晶成核机理和生长方式没有改变。
The non-isothermal crystallization kinetics of ultrahigh molecular weight polyethylene (UHMWPE) and silane crosslinked UHMWPE were studied by differential scanning calorimetry (DSC). The non-isothermal crystallization process was processed by Jeziorny method and Mo method respectively. The results showed that the three-dimensional network formed by the molecular chains of silane cross-linked UHMWPE inhibited the relative movement between molecular chains and segments, hindered the formation of molecular chains The regular arrangement affects the speed of the regular arrangement of the diffusion and migration of the segments in the crystalline zone, which slows the crystallization rate and inhibits the crystal growth. However, at all crystallization rates, Avrami index n of samples was between 1.6 and 2.0, indicating that the nucleation mechanism and growth mode of UHMWPE did not change.