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将松香与甲基丙烯酸-β-羟乙酯(HEMA)合成的酯化物,通过自由基聚合的方法制备了均聚物和与苯乙烯(St)的共聚物,用红外光谱(IR)和核磁共振氢谱(1HNMR)表征了产物的分子结构,分别用综合热分析仪(TGA)和差示扫描量热仪(DSC)表征了产物的热稳定性和玻璃化转变温度。结果表明:松香HEMA酯的均聚反应较难进行,过氧化苯甲酰是其均聚反应较好的引发剂;松香HEMA酯与苯乙烯(St)较易进行共聚反应,偶氮二异丁腈是共聚反应较好的引发剂;共聚物的黏度和玻璃化转变温度随苯乙烯的用量的增加而增加,而均聚物热稳定性好于共聚物。 相似文献
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Long Yi Jin Ruibin Hou Tie Chen Minghai Fang Soukil Mah Bingzhu Yin 《Fibers and Polymers》2007,8(2):143-147
A functional monomer, containing a 34-membered monoazacrown ether unit (VACE) as a pendant group has been synthesized by using
resorcinol, tetraethylene glycol, p-tolenesulfonyl chloride and 4-vinylbenzyl chloride as starting materials. The product
structure was characterized by means of FT-IR,1H-NMR, EA and MS. Free radical homopolymerized VACE or copolymerized VACE with styrene (ST) by the conventional radical initiator
2,2′-azobis (isobutyronitrile) (AIBN) in toluene solution to afford corresponding polymers. The reactivity ratio of VACE and
ST, determined by Fineman-Ross method, gave values 0.6 for VACE, and 1.4 for ST, respectively. 相似文献
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Sesquiterpenes have antifungal, antibacterial, and anesthetic properties. It is also thought that they prevent migraines and can be used as antibiotics and to treat malaria, but there are very few in-depth testing results available to support these claims. Nanocapsules coated by medicinal plants have many applications in drug manufacturing. Medicinal plants can be loaded on nanocapsules with the polyester triblock copolymer polyethylene glycol-polybutylene adipate-polyethylene glycol (PEG-PBA-PEG) as the shell and olive oil as the core by a process known as the polymer deposition solvent evaporation method. It has been shown that the size of nanocapsules depends on a variety of factors, such as the ratio of polymer to oil, concentration of polymers, and concentration of plant extract. In this research we attempted to prepare nanocapsules by emulsification of a mixture of onopordopicrin extracted from Onopordon leptolepis DC., polymer, acetone, and olive oil in aqueous phase without using surfactant. The nanocapsules were characterized by scanning electron microscopy and zeta potential sizer. 相似文献
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农用明胶基高吸水材料的制备与研究 总被引：1，自引：0，他引：1
[目的]研究农用明胶基高吸水材料的制备方法及性能。[方法]以明胶为基质、丙烯酸为单体、N,N′-亚甲基双丙烯酰胺为交联剂、过硫酸钾为引发剂,通过微波辐射的方法合成高吸水性树脂。考察了丙烯酸中和度、引发剂用量、交联剂用量等因素对材料吸水性能的影响。[结果]当丙烯酸中和度为70%、引发剂过硫酸钾用量为0.20 g、交联剂用量为0.010 g、去离子水10.0 ml及120 W微波反应5 min时,所制备的明胶基吸水性材料对去离子水的吸液倍率可达420 g/g。[结论]研究结果为明胶基高吸水材料的制备和应用提供了一定的科学依据。 相似文献
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简要论述了近几年国内科研单住和生产企业在多元共聚乳液方面的研究状况，主要集中在共聚与共混改性、聚合技术改性及交联改性等方面。 相似文献
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