《无皂乳液聚合聚苯乙烯微球论文》由会员分享，可在线阅读，更多相关《无皂乳液聚合聚苯乙烯微球论文（34页珍藏版）》请在金锄头文库上搜索。
1、论文题目：无皂化乳液聚合制备聚苯乙烯微球专 业：高分子材料与工程学生：桑玮（签字）指导老师：后振中（签字）摘 要随着科学技术的发展，高分子微球的应用越来越广泛，特别是单分散型聚合物微球受到人们的关注，成为研究热点。在各种高分子微球中，聚苯乙烯(PS)微球研究较多，应用较广，在色谱柱填料、光子晶体光学滤波器、光开关、高密度电磁数据存储器、化学和生物化学传感器等领域具有重要用途。传统PS 微球的制备方法有:乳液聚合法，分散聚合法，悬浮聚合法。这些方法需要大量的添加剂，后处理复杂，环境污染严重，所得产品表面不洁净，成本较高。无皂乳液聚合是指完全不含乳化剂或仅含少量乳化剂的乳液聚合,与传统的聚合方法相
2、比，成本低，后处理工艺简单，表面洁净，环境污染小。本文采用无皂乳液聚合法制备聚苯乙烯微球，研究了单体浓度，引发剂用量，反应体系离子浓度和温度对聚苯乙烯微球粒径的影响。结果表明，保持其它条件不变，聚苯乙烯微球的粒径随单体浓度的增大而增加；引发剂浓度增大，微球粒径减小；反应体系中离子强度增大，微球粒径增大，离子浓度过大时容易结块且不形成微球。另外，温度对苯乙烯聚合影响较大，温度相对较低时很难发生聚合。对所得产物进行红外光谱（FTIR）、扫描电镜（SEM）和激光粒度（DLS）的表征，结果显示，当苯乙烯用量为 0.087mol，过硫酸钾用量为 1.30mmol ，NaCl 用量为 2.56mmol，反
3、应温度为 80，反应时间为 12h 时，所得 PS 微球的平均粒径约为 0.83m，分散性和粒径分布相对较好。关键词：聚苯乙烯微球，无皂乳液聚合， 制备方法， 应用选题类型:ASubject:Soap-free emulsion polymerization preparation of polystyrene microspheresSpeciality:Polymer materials and engineeringstudent:Sang Wei(Signature)Instructor:HouZhenzhong(Signature)ABSTRACTWith the developme
4、nt of science and technology, the application of polymer microspheres more and more widely, especially the single dispersible polymer microspheres by the attention of people, become a research hotspot. Among various kinds of polymer microspheres, polystyrene (PS) microspheres, which is widely used i
5、n the chromatographic column packing, photonic crystal optical filter, light switch, high-density electromagnetic data storage and chemical and biological chemical sensors, etc. Traditional preparation of PS microspheres: emulsion polymerization, dispersion polymerization, suspension polymerization.
6、 These methods need a lot of additives, post-processing complex and serious environmental pollution, the product surface is not clean, the cost is higher. Soap-free emulsion polymerization is entirely without emulsifier or only contains a small amount of emulsifier in emulsion polymerization, compar
7、ed with the traditional polymerization methods, low cost, simple post-treatment processing, the surface is clean, environment pollution is small. This article studied the monomer concentration, initiator dosage, reaction system ion concentration and temperature on the influence of particle size of p
8、olystyrene microspheres. The results showed that other conditions remain unchanged, theparticle size of polystyrene microspheres increased along with the increase of monomer concentration; Initiator concentration increases, the microspheres particle size decreased; Reaction system in the ionic stren
9、gth increases, the microspheres particle size increases, the ion concentration is too large when easy to agglomerate and formation of microspheres. In addition, the influences of temperature on the polymerization of styrene; aggregation at relatively low temperature is difficult to occur. The produc
10、ts for the infrared spectra (FTIR), scanning electron microscopy (SEM) and laser particle size (DLS) characterization, results show that when the dosage of styrene is 0.087 mol, dosage of potassium persulphate 1.30 mmol, dosage of NaCl was 2.56 mmol, the reaction temperature is 80 , the reaction tim
11、e of 12 h, the average particle size of the PS microspheres of about 0.83 m, dispersion and particle size distribution is relatively good。Key words: polystyrene microspheres, soap-free emulsion polymerization, the preparation methods， applicationsTopic type: A目录摘 要 .IABSTRACT .II目录 .IV第一章 前 言 .11.1高分子微球概述 .11.2聚苯乙烯微球的应用 .21.3聚苯乙烯微球的合成方法 .21.3.1乳液聚合 .31.3.2悬浮聚合 .4181.3.3分散聚合 .6221.3.4种子乳液聚合法 .71.3.5无皂乳液聚合 .81.4本论文的研究目的，意义以及主要内容 .10第二章 实验部分 .112.1无皂乳液聚合引发机理 .112.2试验方法 .122.2.1 实验所需的设备和仪器 .122.2.2 实验所需的试剂及处理 .122.2.4实验方案及流程 .132.2.3聚苯乙烯微球的制备 .142.3
