丙烯酸酯与丙烯酰胺共聚物表面活性剂的合成

研究了烷基酚聚氧乙烯醚丙烯酸酯活性大单体的合成。以ＤＭＦ为溶剂,过氧化物为引发剂,烷基酚聚氧乙烯醚丙烯酸酯（ＡＥ）、丙烯酰胺（ＡＭ）和丙烯酸异辛酯（ＭＧ）共聚,得到了三元共聚物（ＡＥＡＭＭＧ）高分子表面活性剂,探讨了单体组成、引发剂和溶剂用量、反应温度对共聚物表面活性和粘度的影响。结果表明,ＡＥＡＭＭＧ共聚物表面高,增粘能力强,１％共聚物水溶液的表面张力低达３２．４ｍＮ／ｍ,油水界面张力小于１ｍＮ     

丙烯酸酯/硅氧烷共聚物乳液的合成

采用预乳化部分连续法，以丙烯酸丁酯，八甲基环四硅氧烷和少量甲在丙烯酰氧丙基三甲氧基硅烷作为共聚单体，以过硫酸铵和十二烷基苯碘酸作为复合引发剂，制得丙烯酸酯／硅氧烷共聚物乳液，考察了聚合反应机理，产物结构及其交联性能，其结果表明：反应是先进行自由基聚俣，后进行缩聚的同时异步聚合反应机理，经FTIR，DSC测试表明，所得的聚合物乳液具有自身不交联，破乳后或涂覆后室温交联的优异性能。     

水性丙烯酸酯类共聚物乳液的合成与应用

通过查阅国内外有关文献资料 ,阐述了水性丙烯酸酯类共聚物乳液的制备方法、性能改进及应用 ,综述了水性丙烯酸类共聚物乳液目前的研究现状和发展趋势 ,并对这一蓬勃发展的新型聚合物乳液作了展望     

高固含量丙烯酸酯共聚物乳液的合成与性能

合成了固含量６７％左右的丙烯酸丁酯、甲基丙烯酸甲酯、甲基丙烯酸共聚物乳液。对其性能进行了测试,考察了复合乳化剂的复合比例对该丙烯酸酯共聚物乳液的合成及性能的影响。     

丙烯酸酯共聚物水性涂料的研究

合成了一种丙烯酸酯共聚物，用ＧＰＣ法测得的Ｍｎ＝１．１０×１０＾４，ＭＷ＝２．７１×１０＾４，分散性２．５。用ＤＳＣ法测得Ｔｇ＝３４．０８℃。在共聚物中加入中和剂和水配制成半透明无皂水溶胶，胶粒直径７５ｎｍ，稠度系数Ｋ＝１．８４５，表面张力２８．５ｄｙｎ／ｃｍ。在水溶胶中加入固化剂和催化剂，配制无皂水性涂料。涂料具有良好的冻融稳定性、贮存稳定性、耐水性和耐酸碱性等。     

水性EVA处理剂的制备及其性能研究

采用不同的结构的多元醇,分别与异氟尔酮二异氰酸酯(IPDI)、二羟甲基丁酸(DMBA)进行预聚反应、丙烯酸羟乙酯(HEA)封端预聚体,再加水分散制备可UV固化的WPUA乳液。产物的红外光谱(FT-IR)在811 cm~(-1)处观察到了C=C双键的特征吸收峰。用合成的WPUA乳液配合光引发剂和不同的助剂制得水性EVA处理剂,比较了不同结构的处理剂在EVA鞋材上的处理效果,结果表明一种结构的二聚酸聚酯二醇PDFA 3162效果最佳     

水性环氧丙烯酸酯共聚物涂料

采用自制的丙烯酸环氧酯树脂与α，β０－不和乙烯单体共聚，获得了水性环氧丙烯酸酯共聚物树脂，并以此为基料，制得性能优良贮存稳定的色漆，扩大了丙烯酸环氧酯树脂的应用范围。     

平平加丙烯酸酯共聚物增稠剂

本实验选取非离子表面活性剂“平平加”制取它的丙烯酸酯，然后再分别与丙烯酰胺，苯乙烯，丙烯酸甲酯和丙烯酸进行三组份和二组份单体共聚，合成一系列水溶性或碱溶性增稠剂，并对其粘度和粘度系数进行测定，同时对其增稠效果进行了初步比较和讨论。     

耐寒高硬度EVA处理剂的研制

为了获得具有较好的耐寒性及低温施工性的水性高硬度EVA处理剂,我们在乳液型丙烯酸酯共聚物中引入了抗冻剂、次氯酸钠水溶液和小分子团水,通过自制高分子乳化剂合成了一种共聚乳液。该乳液以水为主要分散介质,黏度为40～60mPa·s/25℃,固含量约30%,冻融稳定性佳,使用时几乎无污染,能处理交联密度较高的EVA材料。本乳液冰点低于-20℃,储存稳定性超过6个月,经在-15℃的低温条件下存放1个月后并于0℃的模拟操作环境下试用,在冬季针对高硬度EVA的处理效果可满足鞋厂用户要求。     

含氟丙烯酸酯共聚物的制备及性能

自制含氟丙烯酸酯单体与其他丙烯酸酯分别以溶液聚合和乳液聚合制得含氟丙烯酸酯溶液共聚物(Ⅰ)和乳液共聚物(Ⅱ),并与不含氟的丙烯酸酯共聚物(Ⅲ)性能进行了对比:Ⅰ在水中浸泡96h后涂膜完好,Ⅲ剥离;Ⅱ在水中浸泡24h后吸水率为12 01%～13 65%,Ⅲ为24 87%;Ⅰ、Ⅱ分别在丙酮和w(NaOH)=5%的水溶液中浸泡24h,涂膜基本完好,Ⅲ则剥离、破裂或溶解;w(氟单体)=5%时以KH-570改性Ⅰ并按上述方法测试性能,涂膜完好,硬度由HB提高到H;Ⅰ与水的平均接触角为62 1°～68 4°,Ⅱ为53 9°～61 0°,Ⅲ为29 1°～30 5°,KH-570改性Ⅰ后为63 4°～67 3°。上述结果表明:含氟共聚物涂膜的耐水性、耐碱性、耐溶剂性和自洁性均优于不含氟的共聚物,且含氟单体与KH-570具有良好的协同作用。     

DSC and TGA study of the transitions involved in the thermal treatment of binary mixtures of PE and EVA copolymer with a crosslinking agent

The crosslinking process of PE and EVA with different concentrations of a crosslinking agent (CA) has been studied. The extent of the crosslinking has been evaluated by gel fraction and density measurements. The different transitions involved in the thermal processing and decomposition have been studied by DSC and TGA and compared for all the mixtures prepared. Mechanistic pseudo-kinetic models have been suggested and applied involving all the fractions susceptible of undergoing transitions or reactions. The models applied can be of great interest in understanding the phenomena involved, as well as in modeling the heat effects in the whole processing or pyrolysis of this type of products.     

植物纤维/EVA复合鞋材配方设计及力学性能表征

采用植物纤维与EVA共混改性.探讨了植物纤维含水率对复合鞋材造粒过程的影响;研究了表面处理剂和化学接枝单体及用量对复合鞋材拉伸强度和撕裂强度的影响;研制出适用于植物纤维/EVA复合鞋材的复合发泡剂,并探讨了其用量对复合鞋材拉伸强度和撕裂强度的影响.最终确定了最佳的配方组成和工艺参数,制备出了综合性能良好的复合鞋材.     

Ultrasonic disassociation of EVA random copolymer in dilute solutions

Ultrasonic disassociation of the ethylene–vinyl acetate (EVA) random copolymer in 1,2‐dichloroethane (DCE), cyclohexane (CYH), and their solvent mixtures was investigated using viscometry and dynamic laser light scattering (DLLS). It was found that the disassociation of the EVA aggregates in solutions increases with increasing the time and intensity of ultrasonic shearing and approaches invariant finally. This phenomenon is especially marked for the EVA copolymer with low vinyl acetate (VA) content in the polar solvent of DCE at higher concentration and lower temperature. This is attributed to disassociation of the ethylene segment of the EVA random copolymer in dilute solutions. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2798–2802, 2001     

高发泡EVA膨胀胶块的研制

介绍了一种高发泡乙烯-醋酸乙烯共聚物(EVA)膨胀胶块的制备方法.重点讨论了EVA、发泡剂、发泡促进剂、交联剂、润滑剂、增粘剂及填充荆对发泡性能的影响,确定了膨胀胶块的配方和生产工艺.这类高发泡EVA膨胀胶块目前在汽车NVH(Noise、Vibration、Harshness)领域的应用十分广泛.     

EVA／PE发泡材料的研制

通过对ＥＶＡ／ＰＥ发泡体系各原料的分析选择,在现有的实验室条件下,找出ＥＶＡ／ＰＥ发泡材料的较佳配方及工艺条件,此发泡材料可做为鞋用材料。     

EVA热熔胶及其粉末化探讨

介绍了影响EVA热熔胶粘接性能的主要因素,如EVA分子结构、石油树脂及制备工艺等,探讨了EVA粉末化过程中温度、搅拌强度及分散剂等条件的影响。     

DSC study of transitions involved in thermal treatment of foamable mixtures of PE and EVA copolymer with azodicarbonamide

The transitions and reactions involved in the thermal processing of binary mixtures of polyethylene and poly(ethylene‐co‐vinyl acetate) copolymers with different concentrations of a foaming agent (azodicarbonamide) were studied using differential scanning calorimetry (DSC). The effect of ZnO as a kicker also was discussed. The temperature at the maximum rate and the heat evolved were measured for all the processes—melting, transitions, and reactions—all the mixtures prepared were measured and compared. Azodicarbonamide decomposed differently depending on the polymeric matrix. These data can be very useful for the plastic processing industry. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 2015–2025, 2006     

Preparation of ethylene vinyl acetate (EVA) copolymer nanotubes by wetting of anodic alumina oxide (AAO) method

Ethylene vinyl acetate (EVA) nanotube arrays were successfully prepared through wetting of anodic alumina oxide (AAO) template with polymer melt or solution, a simple physical technique. The results of scanning electron microscope (SEM) demonstrate that the wall thickness of nanotubes via solution wetting method varies from the concentrations of solutions. The EVA nanotubes, obtained from 5.0 to 7.0 wt% EVA solutions, are ca. 40 nm and ca. 60 nm, respectively. As for melt wetting method, the length of nanotubes depends on temperature and the flow properties of polymer melt. The mechanism of forming the nanotubes has been also discussed.     

低硬度动态硫化SBR／EVA热塑性弹性体的制备及性能

采用动态硫化法制备了SBR/EVA热塑性弹性体(简称:SE弹性体),并对其力学性能及微观相态结构进行了研究.结果表明:在实验范围内,SE弹性体呈现出典型弹性体软而韧的应力-应变行为;当SBR/EVA共混比在70/30～60/40之间时,SE弹性体表现出良好的综合性能.显微镜照片表明:SE弹性体拉伸断面较平滑;SBR粒状物平均尺寸为10μm左右,较均匀地分散在EVA基体中.     

人造板封边用EVA热熔胶研制

介绍了有较好耐热性和耐湿性的人造板封边用EVA型热熔胶的制备方法。