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研究了含乙烯基聚二甲基硅氧烷与高压聚乙烯的合金膜(简称PDMVSPEM)的制膜、辐射剂量和材料配比等对PDMVSPVSPEM的氧氮透过选择性、力学性能和表面特性的影响,初步讨论了结构与性能的关系。只要满足温度条件,易用机械共混获得组份分布均匀的合金膜。膜的辐照效应与剂量的关系表现为剂量<0.04兆戈瑞时,产生交联;>O.04～0.08兆戈瑞,交联与裂构同时均匀进行;>0.08兆戈瑞,裂构占主导。在上述辐照剂量范围内,PDMVSPEM的P_(O_2)和α_((O_2)/N_2)未见改变;随PE含量增加,膜的P_(O_2)。呈非对称S形变化,拉伸模量E较拉伸强度δ增长快,断裂伸长ε沿U字形变化。谷底在PE含量40～50％,此刻形态结构处于相逆转阶段,并对应于膜凝胶生成量的低点。PDMVSPEM的相区尺寸很小,仅当PE含量>70％时,SEM图中方可现察到较明显的相分离结构,在PDMVSPEM的最表面层(约 5nm)产生有机硅链段的富集。即使PE含量高达90％,膜的表面特征仍与纯聚甲基硅胶的颇为相近。
The effects of film formation, radiation dose and material ratio on the permeation of oxygen and nitrogen of PDMVSPVSPEM on the mechanical properties and surface properties of PDMVSPVSPEM were investigated. Influence, initially discussed the relationship between structure and performance. As long as the temperature conditions are met, it is easy to use mechanical blending to obtain an alloy film with even component distribution. The correlation between the radiation effect and the dose of the film showed that the cross-linking was produced when the dose was <0.04 trillion guire;> 0.04-0.08 trillion guire, and the cross-linking and fissuring were carried out uniformly at the same time;> 0.08 trillion guorui, Dominated. The P_ (O_2) and α_ ((O_2) / N_2) of PDMVSPEM did not change within the above radiation dose range. The P_ (O_2) of the membrane increased with the increase of PE content. S-shaped asymmetric changes in tensile modulus E than the tensile strength increased rapidly δ, elongation ε along the U-shaped changes. The bottom of the PE content of 40 to 50%, at the moment the morphological structure in phase reversal stage, and corresponds to the membrane gel formation of the low point. PDMVSPEM phase size is very small. Only when the PE content is more than 70%, a clear phase separation structure can be observed in the SEM image, and the enrichment of the organic silicon segments occurs in the outermost layer of PDMVSPEM (about 5nm). Even with PE content as high as 90%, the surface characteristics of the film are still quite similar to pure polymethylsilicone.