共查询到18条相似文献,搜索用时 62 毫秒
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以漆酚铁聚合物(UFP)为基材,采用BreathFigure法制备UFP多孔膜和UFP微球。用扫描电镜观察其形貌,并研究(1)静态和动态的高湿环境下,浓度对UFP多孔膜形貌的影响;(2)聚合物浓度和温度等对UFP微球形貌的影响。结果表明,当环境湿度为85%、潮湿气体流速为400mL/min、聚合物浓度为50.0mg/mL,多孔膜的孔呈圆形且分布均匀。当UFP/二氯甲烷浓度为50.0mg/mL、气氛为甲醇及进样量为10.0μL时,所得的微球的形貌较好。在实验范围内,UFP溶液浓度越大,所制得的UFP多孔膜和微球的形貌越规整。 相似文献
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本文研究采用乙酰化试剂封闭漆酚的一个羟基后再与钛酸丁酯反应 ,然后将被乙酰化封闭的羟基还原出来后 ,与NiCl2 反应合成漆酚钛镍聚合物的方法和工艺条件 ;采用元素分析、红外光谱、质谱、高效凝胶渗透色谱、热分析系统等表征产物的结构特征 ;试验表明PUTN具有优良的耐热性能和耐酸、碱、盐等性能 相似文献
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用热重法研究了漆酚钛锆高聚物热分解反应活化能 ,结果表明用Ozawa -(I)法和Reich法求得的热分解反应平均活化能分别为 2 63.1KJ mol和 2 58.0KJ mol。 相似文献
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漆酚金属聚合物催化酯化的性能 总被引:4,自引:0,他引:4
《中国生漆》1997,(1)
本文报道某些漆酚金属聚合物催化乙酸-丁酸酯化反应的初步研究结果。实验结果表明,锡、钕和铝等漆酚金属聚合物具有明显的催化作用。 相似文献
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文章综述了自组装膜在生物矿化中的应用研究进展。介绍了有机硅烷类、有机硫化物类、脂肪羧酸类和醇胺类等自组装膜体系。概述了自组装膜在碳酸钙、草酸钙和羟基磷灰石研究中的现状,并对其今后的发展趋势进行了展望。 相似文献
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Yanlian Xu Zhaoqiao TongJianrong Xia Binghuan HuJinhuo Lin 《Progress in Organic Coatings》2011,72(3):586-591
Chinese lacquer, a natural polymeric material, and its processing products have been principally used to coat objects of high artistic and pleasing beauty with excellent physico-mechanical properties for centuries. The use of modified urushiol as functional materials, however, is rarely reported in the previous literature. To develop their potentially functional applications, the microporous films of urushiol-formaldehyde polymer (UFP) were fabricated on a solid substrate by using water-assisted assembly method in this paper. The resulted films were characterized by SEM and contact angle measurements. Several influencing factors were considered on the formation of the microporous films with different morphologies, including the concentration of the polymer solution, the relative humidity in the atmosphere, the speed of the moist airflow and the spread volume of the polymer solution. It was found that the pore size of microporous films increased with the increase of relative humidity, the speed of the moisture airflow, and the amount of the solution. Additionally, the ordered pores of UFP films could be formed even under the high concentrations. Furthermore, the as-prepared UFP microporous films had hydrophobic property and good acid-alkali resistance. 相似文献
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《国际聚合物材料杂志》2012,61(11):1009-1018
ABSTRACT Two optical systems are used for characterizing free-standing highly birefringent polymer films. The first system is the Michelson interferometer and is utilized, in the presence of a polarizer, to determine the refractive indices in the two principal vibration directions along and across the axis of the sample, and the birefringence. The second system directly determines the birefringence. It is based on measurements of the optical path difference and the light intensity before and after striking the sample. The results show that the obtained values of birefringence, by the two methods, are in good agreement with each other. Certain optical parameters related to the measured values of refractive indices and birefringence are also calculated. The used methods are recommended for investigating thick and highly birefringent materials, where the conventional methods face certain problems such as the large number of interference fringe order and the highly refractive indices of the used immersion liquids. 相似文献
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采油污水配制聚合物技术在孤东油田的应用 总被引:3,自引:0,他引:3
针对目前配制聚合物需耗费大量清水而采油污水处理和外排困难的问题,研制开发了综合水质改性处理剂SC—I和聚合物溶液稳粘保粘剂JW-I。SC-1的增粘率为78.2%-44.9%,增粘效果比较明显;JW-1加入后,聚合物溶液的粘度稳定性显著提高。因此,采油污水用SC-1和JW-1处理后,用来配制的聚合物溶液的粘度和稳定性都能够得到明显的改善,从而实现了将采油污水快速处理后直接用于聚合物溶液的配制。 相似文献
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《高分子物理》作为高分子材料科学与工程专业的专业基础课,对于学生系统建立高分子结构-性能关系具有重要的指导意义。作者在讲授影响高聚物实际强度的因素过程中,注重从工程角度出发结合形象的实例,帮助学生理清各种影响因素间的关系并加深对知识的认识深度。 相似文献
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浸渍法测量片状结晶性塑料密度的不确定度评估 总被引:1,自引:0,他引:1
按照GB1033—186中的浸渍法测量5种片状结晶性塑料的密度,分析了塑料密度测量的影响因素,如浸渍浓度、测量温度、样品称量等。利用测试数据及JJF1059—1999对浸渍法测量片状结晶性塑料密度的不确定度进行分析评估,得出测量结果的扩展不确定度为0.0073g/cm3。 相似文献