甲基丙烯酸锌增强弹性体的相态研究Ⅰ.混炼胶料

利用扫描电子显微镜（SEM）和透视电子显微镜（TEM）研究了甲基丙烯酸锌增强多种弹性体（包括BR，SBR，EPDM，NBR，EPM，POE和HNBR）的微观相态结构。发现混炼胶在混炼工艺中所具有的粘度是决定ZDMA粒子在混炼胶中分散状态的主要因素，对于高粘度胶料，如EPDM和NBR体系，在混炼中ZDMA颗粒的尺寸显著减小，部分甚至达到了纳米级，而对于低粘度胶料，如POE体系，ZDMA的尺寸特征在混炼工艺中基本不变。由于ZDMA在橡胶中的原位聚合反应历程与其分散尺寸密切相关，所以这种ZDMA在混炼胶料中初分散状态的不同必然会对其硫化化胶料的最终相态和性能产生重大的影响。

Morphology study on elastomers reinforced by zinc dimethacrylateⅠ.In compounds

The morphologies of various ZDMA - reinforced elastomers (including BR, SBR, EPDM, NBR, EPM, POE and HNBR) were studied by using SEM and TEM. Part I focuses on morphology of mixing compounds. The dispersion and distribution of the ZDMA particles in compound are mainly determined by the viscosity of the compound during mixture processing. For high viscosity matrixes, such as EPDM and NBR, size of ZDMA particles is remarkably fined during mixing, even part of which reaches nano - scale. While for low viscosity matrixes, such as POE, dispersion dimension of ZDMA particle in mixing compound is nearly similar to its original dimension. Such difference of preliminary dispersion structure in compounds must intensely impact on final morphologies and properties of vulcanizates because the in - situ pymolerization of ZDMA in compound during vulcanization strongly depends on the dispersed particle size of ZDMA in compound.