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Self-polymerization and co-polymerization kinetics of gadolinium methacrylate 被引量:1
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作者 Chunhong Wang Shuai Wang +3 位作者 Yujuan Zhang Zhifeng Wang Junliang Liu Ming Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第3期298-303,共6页
Gadolinium methacrylate(Gd(MAA)3) was synthesized by using gadolinium oxide and methacrylic acid as the starting materials and its self-polymerization kinetic was studied based on non-isothermal and isothermal ana... Gadolinium methacrylate(Gd(MAA)3) was synthesized by using gadolinium oxide and methacrylic acid as the starting materials and its self-polymerization kinetic was studied based on non-isothermal and isothermal analysis. Moreover, the monomer reactivity ratios of methyl methacrylate(MMA) and Gd(MAA)3 were evaluated by using Kelen-Tiidos method. The thermal neutron shielding properties of PMMA and poly(MMA-co-Gd(MAA)3) were calculated by MCNP program. The results show that the selfpolymerization of Gd(MAA)3 can be initiated by thermal and free radical and its activation energy is103.35 kJ/mol or 58.55 kJ/mol correspondingly in the solid state or aqueous solution. The polymerization rate,Rp,under low conversion at 65 ℃ is expressed as Rp = K[M]^(1.05)[I]^(0.60). The reactivity ratios of r1(MMA) and r2(Gd(MAA)3) are 0.225 and 1.340, respectively. The ability of thermal neutron shielding of poly(MMA-co-Gd(MAA)3) is increased by gadolinium contents and is far better than PMMA. 展开更多
关键词 Gadolinium methacrylate Thermal analysis polymerization kinetic Thermal neutron shielding Rare earths
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