共查询到19条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
辐射聚合在高分子合成中的应用 总被引:2,自引:0,他引:2
简要综述了辐射聚合的引发聚合原理以及特点,分别介绍了辐射聚合在水凝胶、药物缓释剂、增稠剂、高吸水性树脂以及其他领域的应用,报道了辐射聚合在应用领域的最新研究进展,并对辐射聚合合成高分子的应用前景做了进一步的展望。 相似文献
5.
6.
7.
反相悬浮聚合工艺制备吸水树脂及其性能研究 总被引:1,自引:0,他引:1
采用反相悬浮聚合工艺制备聚丙烯酸钠吸水树脂,研究了分散剂和搅拌转速对反相悬浮聚合体系稳定性的影响以及丙烯酸中和度、阻聚剂和交联剂对树脂吸水性能的影响.结果表明:采用聚甘油单硬脂酸酯为分散剂、搅拌转速300~450 r/min时,反相悬浮聚合体系稳定性好、制得分散性良好的均匀珠状吸水树脂;以聚乙二醇二缩水甘油酯(400)为交联剂,制得吸水树脂水溶性组分质量分数小于4%;丙烯酸中和度(摩尔分数)为80%时,树脂的吸水倍率与吸生理盐水倍率达到最大值,分别为683和68;丙烯酸中存在的阻聚剂对羟基苯甲醚不会影响树脂的吸水性能. 相似文献
8.
9.
10.
聚丙烯酸类超强吸水剂的合成与性能研究 总被引:4,自引:0,他引:4
以丙烯酸烯丙酯作为交联剂、丙烯酸(AA)为单体、过硫酸钾(KPS)为引发剂,采用溶液聚合法合成了一种聚丙烯酸类超强吸水剂。研究了合成条件对吸水性能的影响:当ρ(丙烯酸烯丙酯)=0 594g/L,ρ(KPS)=0 178g/L,单体中和度x(丙烯酸钠)=90%,c(丙烯酸钠)=4 17mol/L,聚合温度为60℃时,制得的聚合物每克吸去离子水最高达到1360mL,吸盐水(生理盐水)162mL。所得的聚合物具有良好的吸水可逆性,30min的吸水量可以达到饱和吸水量的90%。制得聚合物的热重分析表明,未吸水的该聚合物在350℃开始分解。聚合物吸水前后XRD测试结果显示:吸水前聚合物结构基本无规整性,吸水后膨胀使主链展开,结构趋于规整。 相似文献
11.
乳液聚合法丙烯酸酯类聚合物的合成及抗静电性能考察 总被引:1,自引:0,他引:1
通过种子预乳化半连续乳液聚合技术,以苯乙烯(St)、丙烯酸丁酯(BA)和丙烯酸羟乙酯(HEA)为共聚单体,合成一类新型的两亲聚合物。考察了引发剂用量、乳化剂用量、反应温度等因素对乳液聚合工艺及聚合物的影响,优化了反应条件,同时对合成聚合物的结构、表面电阻率及亲水性进行了考察。结果表明:当乳化剂质量分数为0.75%、引发剂质量分数为0.5%、HEA质量分数为40%时,合成的乳液稳定性能最佳,转化率高达98.42%;聚合物的表面电阻率低达4.93×105Ω,且其亲水性好。 相似文献
12.
In this study, a random copolymer of N-isopropylacrylamide and N-vinyl-pyrrolidone [poly(NIPAM-co-NVP)] having a thermoresponsive character was prepared by a radiation copolymerization method. Poly(ethylene glycol), PEG 4000, was included in the copolymerization recipe to increase the thermoresponsivity of the resultant copolymeric structures. NIPAM-co-NVP copolymers with different thermoresponsive properties were obtained by changing the initial NIPAM/NVP mol ratio, total monomer, and PEG 4000 concentrations. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1775–1784, 1997 相似文献
13.
14.
15.
N-马来酰基-氨基丙酸丁酯微乳液的微波聚合 总被引:2,自引:1,他引:2
在微波条件下,以十二烷基硫酸钠为乳化剂,过硫酸钾为引发剂的N-马来酰基-氨基丙酸丁酯(BAM)微乳液聚合。研究了聚合时间对聚合速率和转化率的影响。并用PERKIN-ELMERFTIR-1710红外光谱仪、PE-2400有机元素分析仪、DT-40差热分析仪对聚合物进行了检测。 相似文献
16.
N—己基马来酰亚胺微乳液聚合动力学研究 总被引:1,自引:0,他引:1
配制了SDS/NHMI/ H2O 三组分O/ W 微乳液,对其相行为进行了分析。用过硫酸钾引发该体系进行微乳液聚合,并对聚合动力学进行了研究。结果表明,N- 己基马来酰亚胺的微乳液聚合动力学基本上符合常规乳液聚合中的Smith - Ewart 理论,但乳化剂对聚合的影响比较特殊。 相似文献
17.
18.
A novel polymer electrolyte membrane was synthesized by radiation-induced grafting and consequent atom transfer radical polymerization (ATRP). First, bromine-containing perfluorinated grafts were prepared by radiation grafting of 2-bromotetrafluoroethyl trifluorovinyl ether (BrTFF) into a poly(ethylene-co-tetrafluoroethylene) (ETFE) film. Then, the bromine atoms in the ETFE-g-PBrTFF grafted films were acted as initiators, and the films were treated with Cu(I)-based catalytic system of a CuBr and 2,2′-bipyridyl (bpy) for the ATRP. By adjusting the molar ratio of initiator/CuBr/bpy and the reaction temperature, branched poly(styrene) with a grafting yield of above 100% on the poly(BrTFF) main chains was constructed in ETFE-g-PBrTFF films. Thermal analysis revealed that the perfluorinated poly(BrTFF) main chains were miscible to ETFE, whereas the hydrocarbon poly(styrene) branches were phase-separated from the ETFE-g-PBrTFF film. Sulfonic groups could be further introduced into the poly(styrene) grafts of ETFE-g-PBrTFF-g-PS films with homogeneous distribution in a perpendicular direction to the membrane surface. The resulting membrane with a styrene grafting yield of 15% exhibited higher proton conductivity than commercial Nafion 117 membrane. Likewise, it had better chemical stability than ETFE-g-PSSA membrane prepared by conventional radiation-induced grafting. 相似文献