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本文报导利用~(60) Coγ射线引发以三氟三氯乙烷为溶剂的三氟氯乙烯与乙烯溶液共聚合的研究.聚合有诱导期(小于40伦/秒时)而无后效应.平均聚合速率比本体辐射聚合快一倍以上.聚合初速率与辐照强度成0. 5次方关系,DPPH 完全抑制聚合反应,聚合按自由基机制进行.聚合总活化能为3. 5千卡/克分子.求得单体竞聚率γ_(OTFE·E)=0. 025,γ_(E·CTFE)=0. 20,所得共聚物为交替共聚物.共聚物熔点随单体配比中三氟氯乙烯含量的增加而增加,随聚合温度的升高而降低,而与辐照强度和溶剂比关系不大.聚合率(P%)与辐照强度(I)、除去诱导期的辐照时间(t)和溶剂 FC-113比例(φ)的关系近似地由下式表示:P%=10~(-1. 28·t~(1. 23) ·I~(1. 12) ·φ~(-0. 508)熔融指数(M.I.)与辐照温度(T)和溶剂 FC-113比例(φ)的关系近似地由下式表示:M.I.=1. 586·10~(-4) ·φ~(3. 3) ·T~(1. 78) (克/10分)
This paper reports the copolymerization of chlorotrifluoroethylene with trifluoro-trichloroethane (TCE) with ethylene using a ~ (60) Coγ-ray. Polymerization has an induction period (less than 40 r / s) with no post-effects. The polymerization rate faster than the bulk radiation polymerization more than double the initial rate of polymerization and irradiation into a relationship of 0.5, DPPH completely inhibit the polymerization, polymerization by the free radical mechanism polymerization activation energy of 3. 5 kcal / The monomer copolymerization rate γ_ (OTFE · E) = 0. 025, γ_ (E · CTFE) = 0. 20, the resulting copolymer is an alternating copolymer. The melting point of the copolymer with the monomer ratio of tris The content of chlorotrifluoroethylene increased with the increase of polymerization temperature, but decreased with the increase of polymerization temperature, but not with the ratio of irradiation and solvent. The polymerization rate (P%) and irradiation intensity (I) The relationship between the time (t) and the solvent FC-113 ratio (φ) is approximated by the following equation: P% = 10 -1.28 · t -1.23 · I -1.12 · φ The relationship between the melt index (MI) and the irradiation temperature (T) and the solvent FC-113 ratio (φ) is approximated by the following equation: MI = 1.568 × 10 -4 φ ~ (3.3) · T ~ (1.78) (g / 10 minutes)