γ Radiolysis of poly (butene-1 sulfone) and poly(hexene-1 sulfone)
γ Radiolysis of poly (butene-1 sulfone) and poly(hexene-1 sulfone)
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聚(1-丁烯-1 砜)和聚(1-己烯-1 砜)的γ辐射解
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
J. H. O′donnell
中科院分区：
文献类型：
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作者：
J. Brown;J. H. O′donnell
已经表明，聚（丁烯-1砜）和聚（己烯-1砜），它们是+CH 2CHR-SO 2 +n型的1：1交替共聚物，在空气和真空中以固态辐照时经历快速降解。G（断裂）= 10.7（对于聚（丁烯-1砜）在0°下）和9.8（对于聚（己烯-1砜）在30°下），均在真空中。在空气中照射的G值（断裂）较高。在0°下的主要挥发性产物是二氧化硫，产率与G（断裂）相当，表明C-S断裂的特异性和通过SO2消除的主链断裂的稳定性。增加辐射温度导致作为聚合物的热力学不稳定性的结果的两种共聚单体的解扩增加。氢气是另一种主要的挥发性产物，还有极少量的饱和烃。宽的初始分子量分布朝向最可能的分布仅略微降低，表明发生了一些交联。
It has been shown that poly(butene-1 sulfone) and poly(hexene-1 sulfone), which are 1:1 alternating copolymers of the type +CH2CHR-SO2+n, undergo rapid degradation upon irradiation in the solid state in air and in vacuo. G(fracture) = 10.7 for poly(butene-1 sulfone) at 0° and 9.8 for poly(hexene-1 sulfone) at 30°, both in vacuo. The values of G(fracture) were higher for irradiation in air. The main volatile product at 0° was sulfur dioxide, in comparable yield to G(fracture), suggesting specificity of C-S fracture and stabilization of main-chain fracture by SO2 elimination. Increasing irradiation temperatures resulted in increasing depropagation to the two comonomers as a result of the thermodynamic instability of the polymer. Hydrogen was the other main volatile product, and there were very small amounts of saturated hydrocarbons. The broad initial molecular weight distributions were only slightly reduced toward the most probable distribution, indicating that some cross-linking occurred.