中文摘要：

研究不同组成配比下的聚甲醛（POM）／聚氧化乙烯（PEO）晶／晶共混体系溶液结晶行为和结晶形态。结果表明：POM和PEO溶于其共同溶剂六氟异丙醇（HFIP），溶剂挥发过程中两组分由于分子链的相互作用，形成不完善结晶，POM在DSC升温曲线中出现熔融双峰，高熔点峰与纯POM熔点峰相同，而低熔点峰则随PEO含量增大而降低。PEO熔点随POM含量增大而降低。偏光显微镜测试表明：当体系中PEO质量含量低于40％时，POM球晶明显，其直径随PEO含量增加而增大，PEO形成碎晶；当PEO质量含量在60％到80％之间，POM先结晶形成较小的球晶，PEO后结晶，并可穿越POM球晶继续生长至布满整个视场。

英文摘要：

Crystallization behavior and morphology in solution blends of polyoxymethylene （POM） and poly （ethylene oxide） （PEO） by varying blend composition had been investigated. Experimental results indicated that the two components crystallized imperfectly from solution at room temperature when the solvent Hexafluoroisopropanol （HFIP） volatilized. Crystallization of each component was restricted by the other. POM showed dual melting peaks in DSC heating traces. Its lower melting points decreased with the increase of PEO content,while the higher melting points were all close to that of pure POM. PEO＇ s melting points decreased when POM content increased. When PEO content was below 40 % ,spherulites size of POM enlarged with increasing of PEO content,while PEO formed fragmentized crystal. When PEO content was between 60 % and 80 % ,POM crystallized first,and then PEO crystallized upon or even through POM spherulites.