Synthesis of EPDM-g-PMMA through atom transfer radical polymerization
Synthesis of EPDM-g-PMMA through atom transfer radical polymerization
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DOI：
10.1016/s0032-3861(98)00693-4
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发表时间：
1999-07
期刊：
影响因子：
4.6
通讯作者：
Xiaosong Wang;N. Luo;S. Ying
中科院分区：
文献类型：
--
作者：
Xiaosong Wang;N. Luo;S. Ying
介绍了一种制备以三元乙丙橡胶（EPDM）为骨架、聚甲基丙烯酸甲酯（PMMA）为支链的接枝共聚物的新方法。首先将EPDM与N-溴代丁二酰亚胺（NBS）反应生成溴代EPDM（EPDM-Br），然后在CuBr/bpy存在下，以EPDM-Br为引发剂，在90°C下引发MMA的原子转移自由基聚合（ATRP）生成EPDM-g-PMMA。研究表明，在纯EPDM存在下，烯丙基溴/CuBr/bpy引发MMA ATRP不存在自由基转移接枝聚合。PMMA接枝链的增长是由EPDM-Br和CuBr反应产生的EPDM自由基原位引发的。考察了溶剂、反应时间、EPDM-Br：CuBr：bpy物质的量比等反应条件。当EPDM-Br：CuBr：bpy = 1：0.8：2.4时，在90°C下反应20 h，接枝效率最高，达93%。用溶剂萃取、红外光谱、核磁共振氢谱等方法对接枝共聚物进行了表征。
A new method to prepare the graft copolymers that have an ethylene-propylene-diene terpolymer (EPDM) rubber backbone and poly(methyl methacrylate) (PMMA) branches was described. Firstly, the brominated EPDM (EPDM-Br) was produced by the reaction between the EPDM and N-bromosuccinimide(NBS), then the EPDM-g-PMMA was created by the ATRP of MMA initiated by EPDM-Br in the presence of CuBr/bpy at 90°C. The study shows that the free radical transfer grafting polymerization does not existed in the ATRP of MMA initiated by allyl bromide/CuBr/bpy in the presence of pure EPDM. The propagation of the PMMA graft chains are in situ initiated by EPDM radicals which is created through the reaction between the EPDM-Br and CuBr. Moreover, the reaction conditions, such as solvent, reaction time, molar ratio of EPDM-Br:CuBr:bpy, were examined. The maximum graft efficiency(93%) was obtained at 90°C for 20h, when the ratio of EPDM-Br:CuBr:bpy was 1:0.8:2.4. The graft copolymers were characterized by solvent extraction, IR and H1-NMR spectra technique.