| 低强度超声波辐照引发MMA的本体聚合 |
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| 引用本文： | 马素德,宋国林,钟力生,苗宗成.低强度超声波辐照引发MMA的本体聚合[J].高分子材料科学与工程,2012(1):16-18. |
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| 作者姓名： | 马素德 宋国林 钟力生 苗宗成 |
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| 作者单位： | 西京学院基础部;清华大学深圳研究生院新材料研究所;西安交通大学电力设备电气绝缘国家重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50572045);陕西省教育厅专项科研计划项目(11JK0827);西京学院校内基金资助项目(10B02) |
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| 摘 要： | 利用功率密度仅有0.25 W/cm2的超声波为辐射源对溶有聚甲基丙烯酸甲酯(PMMA)的MMA物料体系进行辐照引发了MMA的本体聚合。考察了超声波、促进剂、阻聚剂、反应气氛等因素对聚合反应的影响,利用凝胶色谱仪对产物分子量及分布进行了表征。结果表明,该反应为自由基引发聚合,大分子与单体之间的摩擦力是产生自由基的根本原因;超声波频率、辐照时间等对聚合速率有明显影响;产物具有较为规整的分子量分布且几乎不含引发剂残基,可应用于对材料纯度有特殊要求的领域。
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| 关 键 词： | 低强度 超声波 本体聚合 |
Irradiation of Low Intensity Ultrasonic to Initiate the Bulk Polymerization of MMA |
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| Sude Ma,Guolin Song,Lisheng Zhong,Zongcheng Miao.Irradiation of Low Intensity Ultrasonic to Initiate the Bulk Polymerization of MMA[J].Polymer Materials Science & Engineering,2012(1):16-18. |
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| Authors: | Sude Ma Guolin Song Lisheng Zhong Zongcheng Miao |
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| Affiliation: | 1(1.Department of Basic Courses,Xijing University,Xi’an 710123,China;2.Advanced MaterialsInstitute,Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,China;3.State KeyLaboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China) |
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| Abstract: | Methyl methacrylate(MMA) was polymerized in bulk solutions using low intensity ultrasonic radiation of 0.25 W/cm2.The factors affecting the polymerization(i.e.ultrasonic,PMMA granular,inhibitor and reaction ambience) were investigated,and the sample of polymer was characterized by gel permeation chromatography technique.The results mean that the reaction is initiated by free radicals and the radicals come from the friction between the macromolecule of PMMA and monomer of MMA.Several factors(i.e.the frequency of the ultrasonic,the time of irradiation) can strongly affect the polymerization rate.The product gained by the ultrasonic irradiation has a more regular molecular weight distribution and which contains scarcely any initiator,so the product has potential applications in some areas. |
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| Keywords: | low intensity ultrasonic bulk polymerization |
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