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本系列工作的此部分系用小角激光光散射,小角x光散射,广角x光衍射等技术考察了高密度聚乙烯的球晶、片晶和微晶等宏观和微观结构在不同辐照条件下的行为和变化,发现辐照交联对聚乙烯球晶结构有保持效应,且这种效应随辐照剂量的增大而加强;辐照交联对聚乙烯的片层结构也有保持效应,但对片晶内部却有破坏效应,辐照导致了聚乙烯结晶的晶胞膨胀,用“片晶内部破坏”机理解释x光小角散射积分不变量随辐照剂量单调下降比用“片晶表面破坏”机理解释更为合适。
This part of the work of the Department of small-angle laser light scattering, small angle x-ray scattering, wide angle x-ray diffraction and other techniques examined high-density polyethylene spherulites, lamellar and microcrystalline macroscopic and microscopic structure under different irradiation conditions The results showed that irradiation cross-linking had a retention effect on the spherulitic structure of polyethylene, and this effect was enhanced with the increase of irradiation dose. Radiation cross-linking also had a retention effect on the lamellar structure of polyethylene, There is a damaging effect on the interior of the lamellae. Irradiation led to the expansion of the polyethylene crystallized unit cell. With the “internal lamellae destruction” mechanism, the integral invariant of the x-ray small-angle scatter decreases monotonically with the irradiation dose as compared with the " Mechanism to explain more appropriate.