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本文探讨了用特性粘数与吸收剂量的关系式[η]=k(D+D_0)~(-a)表达聚乙烯醇的辐射裂解。(1)阐明了D_0的求法。(2)证实了[η]=k(D+D_0)~(-a)式中的a值与Mark-Houwink方程[η]=kM_v~a’中的a’值是等同的。(3)将这二公式联立起来,求得裂解度(p_0)和辐射裂解产额(G)。(4)由p_0和D_0反推聚乙烯醇的起始数均聚合度(DP)_0。
This article explores the radiative cleavage of polyvinyl alcohol using the relation [η] = k (D + D_0) ~ (-a) between intrinsic viscosity and absorbed dose. (1) Clarified the method of D_0. (2) It is confirmed that the value of a in [η] = k (D + D_0) ~ (-a) is equivalent to the value of a in Mark-Houwink equation [η] = kM_v ~ a ’. (3) The two formulas are combined to determine the degree of pyrolysis (p_0) and the yield of radiation pyrolysis (G). (4) From p_0 and D_0 initial number of polyvinyl alcohol reverse polymerization degree (DP) _0.