论文部分内容阅读
本工作对高乙烯基聚丁二烯橡胶(HVPBR)与高顺式聚丁二烯橡胶(CPBR)的共混生胶、混烁胶和硫化胶进行超薄切片,透射电镜观察。结果表明,两胶共混存在微相分离结构。共混生胶微区尺寸在0.2—1.5μ之间(图1.2.3),较溶液共混大1—2倍,且分布宽。当HVPBR含量在60％—70％时产生相逆转(图2.3)。CPBR作为分散相时,含包藏结构,粒子呈不规则条状,尺寸也较小,其分散性优于HVPBR在CPBR中的分散性。共混生胶加入炭黑后,微区尺寸减小,相溶性增加,炭黑主要分布于CPBR中(图4.5)。相逆转时的组分比例不变,与炭黑的存在与否无关。相比之下,制备该共混物的电镜样品,硬质胶法(图1—4)比OsO_4染色固定法(图5)更为适宜。
In this work, the biocompatibility, hybridization and vulcanizates of high vinyl polybutadiene rubber (HVPBR) and high cis polybutadiene rubber (CPBR) were observed by transmission electron microscopy. The results show that there is micro-phase separation structure between two gums. The size of the blend gum micro-zone is between 0.2-1.5μ (Figure 1.2.3), 1-2 times larger than the solution blend, and the distribution is wide. Phase reversal occurs when HVPBR content is 60% -70% (Figure 2.3). When CPBR is dispersed phase, it contains inclusions, the particles are irregular and the size is smaller. The dispersibility of CPBR is better than HVPBR in CPBR. Blend rubber added to carbon black, the micro-size decreases, the compatibility increased, the main distribution of carbon black in the CPBR (Figure 4.5). Phase reversal of the proportion of the same components, and the presence or absence of carbon black has nothing to do. In contrast, electron microscopy samples of this blend were harder (Figure 1-4) than the OsO 4 staining method (Figure 5).