论文部分内容阅读
研究了用苯甲酰过氧化物作引发剂的苯乙炔的聚合作用。当引发剂的用量为单体的1克分子％以下时,在60°,聚合作用很少进行,当引发剂的用量为2—4克分子％时,聚合作用明显地发生。当温度由60°升高到130°时,聚合速度显著地增加。所得聚合物的平均分子量为600—1500。红外光谱显示聚合物分子中有C_6H_5COO—端基的存在。在160°聚合产物的红外光谱中,C=O和C—O键的特征吸收基本上消失。 苯乙炔的热聚合在100°以下很少发生,在100—160°,聚合速度随温度升高而迅速增加。 三氟化硼不论在室温或较低温度可以引起苯乙炔的急骤聚合,所得聚苯乙炔的平均分子量在2000以上。 测定了几种聚苯乙炔样品的红外光谱,其中除引发聚合产物显示的苯甲酰氧基的C=O与C—O键的特征吸收外,其余均颇类似。与Okamoto等报导的聚苯乙炔的红外光谱相比较,只是在770—700厘米~(-1)区域内有微小的差异,而光谱的绝大部分是十分类似。因此可以认为,本文中报导的用几种不同的方法所得到的聚苯乙炔很可能具有相同的键结构:
The polymerization of phenylacetylene using benzoyl peroxide as an initiator was studied. When the initiator is used in an amount of 1 mol% or less of the monomer, the polymerization proceeds little at 60 °, and the polymerization occurs obviously when the initiator is used in an amount of 2 to 4 mol%. When the temperature is increased from 60 ° to 130 °, the polymerization rate increases significantly. The resulting polymer has an average molecular weight of 600-1500. Infrared spectroscopy shows the presence of C 6 H 5 COO- groups in the polymer molecule. In the infrared spectrum of the 160 ° polymerization product, the characteristic absorption of the C═O and C-O bonds disappeared substantially. The thermal polymerization of phenylacetylene rarely occurs below 100 °. At 100-160 °, the polymerization rate increases rapidly with increasing temperature. The boron trifluoride can cause the rapid polymerization of phenylacetylene both at room temperature and at lower temperature. The average molecular weight of the obtained polyphenylacetylene is above 2000. The infrared spectra of several samples of polyphenylene vinylene were determined, except for the characteristic absorption of the C = O and C-O bonds of the benzoyloxy groups which were shown by the polymerization products, all of which were quite similar. Compared with the infrared spectrum reported by Okamoto et al. For polyphenylacetylene, there is only a slight difference in the region of 770-700 cm -1, and most of the spectrum is very similar. It is therefore believed that the polyphenylacetylenes obtained in several different ways reported here are likely to have the same bond structure: