共查询到20条相似文献,搜索用时 78 毫秒
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核壳丙烯酸聚合物微粒子乳液的合成与解析 总被引:6,自引:0,他引:6
本文利用种子乳液聚合方法合成了丙烯酸聚合物乳液,核、壳聚合物的组成分别为:m(MMA):m(BA)=76:24和m(MMA):m(BA):m(AA)=46:51:3;种子乳液和核壳乳液的MFT分别为66℃和28℃。说明最终的聚合物微粒子具有硬核软壳结构;通过SEM拍摄的照片可以清晰地观察到聚合物微粒子的大小,经计算,全部聚合物中的种子粒子数和最终粒子数基本相同,且未发现细小的粒子。说明壳单体的聚合完全是在种子粒子上进行的;本文还对影响聚合物微粒子核壳结构的主要因素进行了探讨。 相似文献
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《精细化工原料及中间体》2019,(4)
<正>离子液体化合物及制备方法、离子液体聚合物、其用途以及含该聚合物的聚合物固态电解质本公开涉及一种离子液体化合物及制备方法、离子液体聚合物以及含该聚合物的聚合物固态电解质,具体地本公开提供了式(1)所示的结构的离子液体化合物及其制备方法,并且提供了式(25)所示的结构的离子液体聚合物及其制备方法,该离子液体化合物和离子液体聚合物的阴离子中心为配位能力较弱的全氟磺酰亚胺离子,减小了阴离子中心对Li~+ 相似文献
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综述了聚苯乙烯互穿聚合物网络的研究进展,阐述了分步互穿聚合物网络、同步互穿聚合物网络、半互穿聚合物网络和胶乳互穿聚合物网络的制备方法,介绍了组成和制备方法对PS互穿聚合物网络的相态结构和互穿聚合物网络相容性的影响。阐述了PS互穿聚合物网络的组成和结构对于力学性能、热力学性能、流变性能、气体透过率和吸附性的影响,最后综述PS互穿聚合物网络存在的问题及发展趋势。 相似文献
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In recent papers it has been reported that epoxide-based adhesives form so-called interphases in adhesive joints. The properties of these interphases play an important role concerning the performance and durability of structural adhesive joints under detrimental service conditions. In this paper, the formulation of a basic epoxy adhesive and a methodology for gaining insight into the local mechanical properties of polymer interphases in structural adhesive joints made with ambient temperature curing epoxy adhesive are presented. The localized strain analysis in the cross-section of shear-loaded adhesive joints is accomplished by combining a high precision micro tensile tester with a digital microscope and by developing a method for preparing, marking, and digitally tracking the local deformations in a micro shear specimen. 相似文献
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Rahul K. Lall Andrew Proctor Vishal P. Jain 《Journal of the American Oil Chemists' Society》2009,86(4):309-314
A 30-min, micro-base-catalyzed method for vegetable oil fatty acid methyl ester (FAME) preparation was developed using only
1 mg of oil sample by limiting the solvent volumes used. This method was primarily developed to quickly analyze fatty acid
composition of CLA-rich soy oil but can be further applicable to pure vegetable oils. Existing base-catalyzed FAME preparation
methods are not appropriate to use because they are either rapid but not micro, or micro but not rapid, or are rapid and micro
but use acidification in the final step of FAME preparation, which would isomerize oils containing conjugated fatty acids.
Serial dilutions of a mixed commercial FAME reference standard were prepared and analyzed by GC with a flame ionization detector
(FID) with maximum instrument sensitivity. The novel method was also used to prepare soy oil FAMEs for GC-FID analysis. There
were no statistically significant differences (P < 0.05) in fatty acid data from the FAME reference standard dilutions. Similarly, there was no statistical significant difference
(P < 0.05) between results obtained for all the soy oil dilutions and the control method. This technique is a rapid method for
preparing small pure oil samples as FAMEs for GC-FID analysis. 相似文献
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介绍了电化学方法制备多层膜的研究进展,阐述了单槽法和双槽法制备多层膜的原理、优缺点及适用范围;简述了制备多层膜的电化学方法,为制备多层膜提供了新的思路;同时介绍了多层膜的表征手段并展望了其发展前景. 相似文献