Properties and chemiluminescence of polypropylene stored for a long period
Properties and chemiluminescence of polypropylene stored for a long period
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长期储存聚丙烯的性能及化学发光
DOI：
10.1016/0141-3910(88)90034-1
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发表时间：
1988
影响因子：
5.9
通讯作者：
F. Konoma
中科院分区：
文献类型：
--
作者：
Z. Osawa;S. Wu;F. Konoma
不稳定的等规聚丙烯（IPP）粉末，细于100目，降解强烈，即使在环境气氛中，在黑暗中储存了很长一段时间。因此，聚合物的分子量强烈下降，并形成大量的含氧基团，如氢过氧化物、羟基和羰基。储存的IPP的化学发光强度比新鲜聚合物的化学发光强度高很多，并且通过添加商业稳定剂如抗氧化剂和氢过氧化物分解剂而降低。根据激发态羰基敏化剂9，10-二溴蒽和单线态氧猝灭剂β-胡萝卜素对储存IPP化学发光强度和光谱分布的影响，讨论了化学发光的种类。
Unstabilized isotactic polypropylene (IPP) powder, finer than 100 mesh, degraded strongly even under ambient atmosphere in the dark when stored for a long period. Thus, the molecular weight of the polymer dropped strongly and a large amount of oxygenated groups such as hydroperoxide, hydroxyl and carbonyl were formed. The intensity of chemiluminescence of the stored IPP was a good deal higher than that of the fresh polymer, and was reduced by the addition of commercial stabilizers such as antioxidants and hydroperoxide decomposers. On the basis of the effect of 9,10-dibromoanthracene, an excited carbonyl sensitizer, and β-carotene, a singlet oxygen quencher, on the intensity and spectral distribution analysis of chemiluminescence emitted from the stored IPP, chemiluminescence species are discussed.