透明亲水丙烯酸树脂防雾材料合成工艺研究

研究亲水性水性丙烯酸共聚合防雾树脂合成工艺,确定最优的工艺参数,其中丙烯酸乙酯和甲基丙烯酸甲酯最佳配比为质量比6∶4;官能单体占单体总量的20%,甲基丙烯酸占官能单体总量10%～15%,甲基丙烯酸β-羟乙酯占官能单体总量的8%～10%.     

立体光造型成型材料的制备

以环氧树脂E-51和丙烯酸为基本原料,合成了立体光造型成型材料光敏树脂,通过比较不同树脂体系的固化度及显微硬度,优化了光敏树脂合成工艺;用硅烷偶联剂处理后的SiC纤维对光敏树脂进行了增强,比较了光敏树脂增强前后固化件的抗拉强度.结果表明:预聚物与单体三翔甲基丙烷三丙烯酸的质量比为2:1、光引发剂质量分数为3.5%时,树脂体系固化度最高,硬度指标较理想;光敏树脂经SiC纤维增强后,抗拉强度得到提高.     

树脂结合剂金刚石切割线的树脂层性能分析

针对树脂结合剂金刚石切割线树脂层强度和硬度低等问题,对树脂混合液固化后的性能进行了研究。通过正交试验,以剪切强度为指标,确立了最佳固化温度和固化时间。当树脂固化温度为180℃(60min)时的固化工艺下树脂粘结性能最优。制备了树脂金刚石切割线,进行了锯切试验,试验表明:制备的树脂金刚线性能较优,切片质量较好。     

沙丁胺醇分子印迹聚合物表征及其结合性能研究

以沙丁胺醇为模板分子,甲基丙烯酸为功能单体,乙二醉二甲基丙烯酸酯为交联剂.通过热引发沉淀聚合法,制备沙丁胺醇分子印迹聚合物(MIP).利用扫描电镜(SEM)及比表面积仪(BET)对所制备的MIP进行物理学表征,并比较几种印迹聚合物的结合特性和选择性识别能力.研究表明,以沙丁胺醉为模板制备的分子印迹聚合物对模板具有良好的...     

尼古丁印迹聚合物分子识别特性的光谱研究

以尼古丁为模板分子，甲基丙烯酸为功能单体，乙二醇二甲基丙烯酸酯为交联剂，合成尼古丁分子印迹聚合物。采用紫外光谱和1H核磁共振波谱研究了该印迹聚合物的结合位点和识别机理。结果表明，该聚合物中尼古丁与甲基丙烯酸通过协同氢键作用形成1：2型配合物。甲基丙烯酸分子中羧基氢原子是氢键的质子给予体；尼古丁分子吡啶环和四氢吡咯环上的两个氮原子是接受质子的识别位点。该印迹聚合物通过协同氢键作用选择性的识别尼古丁分子。     

甲基睾酮分子印迹聚合物识别性能的研究

以甲基睾酮为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,通过热引发聚合法,利用分子印迹技术制备了甲基睾酮分子印迹聚合物(MIP).研究了该MIP作为高效液相色谱(HPLC)固定相时对模板分子及其结构类似物的保留行为,同时也考察了在乙腈流动相中添加水对色谱保留行为的影响.此外还运用平衡吸附实验研究了该MIP的结合特性和选择性识别能力.研究表明,以甲基睾酮为模板制备的分子印迹聚合物对模板具有良好的特异性识别能力.     

热塑性丙烯酸树脂涂料及其应用

在国内丙烯酸树脂涂料是近几年发展起来的一种新型涂料,由于它具有优良的附着力、耐候性、保光性、保色性、漆膜色彩鲜艳、耐汽油、抗腐蚀性及机械性能高等性能、因此被广泛应用于航空产品、军用产品、轻工产品及仪器仪表、车辆等方面。 1.热塑性丙烯酸树脂涂料的性能丙烯酸树脂涂料是由丙烯酸树脂与甲基丙烯酸酯共聚树脂为主要成膜物质,加入颜料、有机溶剂、其它辅助材料混合调制而成的一类丙烯酸树脂涂料。丙烯酸树脂涂料中,由于聚合时单体的不同,可分为热塑性及热固性两大类。热塑性树脂其分子结构上主要是利用单体在一种催化剂存在下,碳一碳双键的加聚反应产物,树脂上不含有活性官能团,在加热情况下,不会自己或与其它外加树脂交联反应生成体型结构,而只能软化,冷却后恢复其原来形状。     

研究热固性树脂固化的动态扭振法──LHX-I型树脂固化仪在热固性树脂和树脂基复合材料固化研究中的应用

ＬＨＸ－Ｉ型树脂固化仪能快速定量跟踪热固性树脂和树脂基复合材料在实际成形中的固化过程，是确定热固性树脂、粘合剂、聚氨酯液态橡胶、树脂基复合材料和互穿网络聚合物的配方筛选，最佳固化工艺条件的选择以及生产质量控制和监测的有效工具，也为固化反应表观动力学的研究提供了又一个动态力学方法。     

研究热固性树脂固化的动态扭振法：——LHX—Ⅰ型树脂固化仪在热固性树脂和树

ＬＨＸ－Ⅰ型树脂固化仪能快速定量跟踪热固性树脂和树脂基复合材料在实际成形中的固化过程，是确定热固性树脂，粘合剂、聚氨酯液态橡胶、树脂基复合材料和互穿网络聚合物的配方筛选，最佳固化工艺条件的选择以及生产质量和监测的有效工具，也为固化反应表观动力学的研究提供了又一个动态力学方法。     

用DSC和TG方法研究钼酚醛树脂的固化反应及动力学

采用DSC和TG方法研究了新型钼酚醛树脂的固化行为和固化反应动力学，用TG方法研究了固化产物的热降解性能，并进行了固化机理的探讨。结果表明，No．2钼酚醛树脂，当树脂泪化剂配比为100／10时，固化温度最低，固化反应表现活化能最小，产物的热稳定性能最佳，成炭率最高，其最大固化程度的温度为200℃。     

塑料防雾剂的研究进展

透明塑料材料被广泛应用于工农业生产、航空航天及民用安全防护等领域,而当前研究的热点是用于透明塑料基材的防雾剂。本文综述了防雾剂的防雾机理和使用方法,并对表面活性剂型、高分子型、有机-无机杂化型、光催化型超亲水和特殊纳米结构超亲水防雾剂的研究进展进行了阐述。对北京石油化工学院环境材料研究中心实验室研制的复配型防雾剂进行了简要介绍,并展望了其应用前景。     

Real‐time monitoring of the penetration of amphiphilic acrylate copolymer in leather using a fluorescent copolymer as tracer

A fluorescent tracer, poly (acrylic‐co‐stearyl acrylate‐co?3‐acryloyl fluorescein) [poly (AA‐co‐SA‐co‐Ac‐Flu)], used for real‐time monitoring the penetration of amphiphilic acrylate copolymer, poly (acrylic‐co‐stearyl acrylate) [poly (AA‐co‐SA)], in leather was synthesized by radical polymerization of acrylic, stearyl acrylate and fluorescent monomer, 3‐acryloyl fluorescein (Ac‐Flu). The structure, molecular weight, introduced fluorescent group content and fluorescent characteristics of the fluorescent tracer and target copolymer, amphiphilic acrylate copolymer, were also characterized. The results show that the tracer presents the similar structural characteristics to the target and enough fluorescence intensity with 1.68 wt % of the fluorescent monomer introduced amount. The vertical section of the leather treated with the target copolymer mixing with 7% of the tracer exhibits evident fluorescence, and the change of fluorescence intensity along with the vertical section with treating time increasing can reflect the penetration depth of the target copolymer. The introduction of the fluorescent group in polymer structure through copolymerization with a limited amount of fluorescent monomer, Ac‐Flu, is an effective way to make a tracer to monitor the penetration of the target in leather, which provides a new thought for the penetration research of syntans such as vinyl copolymer materials in leather manufacture. Microsc. Res. Tech. 78:1146–1153, 2015. © 2015 Wiley Periodicals, Inc.     

纳米石墨/聚丙烯酸乙酯复合乳液的合成及其润滑性能研究

采用自由基乳液聚合方法合成了纳米石墨／聚丙烯酸乙酯复合乳液，并用四球摩擦磨损试验机对其润滑性能进行了评估。结果表明，一定浓度的纳米石墨／聚丙烯酸乙酯复合乳液可有效提高水基液的承载能力，降低磨损量。采用IRMM对摩擦磨损试验后的钢球磨斑表面进行分析，结果表明：磨痕变浅，磨斑减小，有效降低了磨损。     

重油专用破乳剂的合成及应用

以苯乙烯(St)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸(AA)为主要组分,合成了一种重油专用破乳剂,红外光谱表征表明,所合成的破乳剂为St、BA、MMA、AA共聚物;在研究单因素变化对产物性能影响的基础上,采用正交设计实验确定各单体配比为St25%,BA32%,MMA35%,AA8%(质量分数);合成的破乳剂在重油中质量分数为2.50×10-4时,水洗后重油钾钠质量分数为8.0×10-7,且油水界面清晰,污水无色透明.     

Corrosive effect of acrylic acid on magnetic head and media of an operating hard disk drive

Magnetic heads and media in a magnetic hard disk drive are often attacked by corrosive gases, such as hydrochloric acid, sulphur dioxide and acrylic acid, ect. In this paper, we investigate the corrosion progress of heads and media subject to contact-start-stop (CSS) operation under diluted acrylic acid vapor attack. It is found that under elevated temperature and humidity, acrylic acid vapor not only accelerates the magnetic hard disk media corrosion rate at carbon overcoat pinhole locations, but also induces new corrosion products such as cobalt acrylate and nickel acrylate. Different corrosion pattern at tribological contact area and non-contact area in an operating hard disk drive are observed and the related corrosion mechanism is discussed. This paper presents a view of corrosion products and corrosion progress at the different locations of magnetic heads and media under the diluted acrylic acid vapor attack in an operating hard disk drive.     

Estimation of uncertainty for sulfonated grafted low density polyethylene dosimeter using thermoluminescent dosimeter

In this work, one type of thermoluminescence dosimeter low density polyethylene grafted by acrylic acid acrylamide, acrylic acid actinamide polymer film (LDPE-g-p (AAm/AAc)) was irradiated by ⁶⁰Co therapeutic gamma ray dose. This work deals with the case of sulfonated grafted film which has good properties such as thermal stability, and good dosimetric properties. The various sources of uncertainty for this type of thermoluminescence dosimeter under study were analyzed. The uncertainty budget tables for radiation measurements were declared. For the used procedure, these uncertainties multiply the coverage factor equal 2 to obtain the expanded uncertainty at 95% confidence level. The combined uncertainty does not exceed 6.3%. The results suggested that, the expanded uncertainty at 95% confidence level should be added to the value of measurements to obtain the accurate dose.     

塑料用快干丙烯酸涂料研究

研究了 SMC汽车保险杠快干丙烯酸涂料 ,合成的热塑性丙烯酸树脂经改性树脂拼混后 ,涂膜具有快干、抗划伤、耐酸碱和洗涤剂等特性 ,满足了 SMC保险杠的涂漆质量要求     

Mechanical and tribological properties of poly(hydroxyethyl methacrylate) hydrogels as articular cartilage substitutes

Poly(hydroxyethyl methacrylate) (p(HEMA)) hydrogels have been proposed as promising biomaterials to replace damaged articular cartilage. A major obstacle to their use as replacement bearing tissue is their poor mechanical properties in comparison with healthy articular cartilage. The purpose of this study was to obtain p(HEMA) hydrogels with physicochemical and mechanical properties close to healthy articular cartilage, by introducing a hydrophilic monomer, namely acrylic acid (AA). Formulations of hydrogels with different amounts of hydrophilic monomer (acrylic acid, AA) were synthesized and tested: p(HEMA), p(HEMA-co-5%AA), p(HEMA-co-25%AA). The macro-mechanical tests were reproduced at nanoscale in order to verify if the superficial properties of the hydrogels are similar to the bulk ones.     

The use of lead methacrylate 2-ethylhexanoate to create a radio-opaque resin suitable for microvascular corrosion casting

A radio-opaque methacrylate-based resin suitable for microvascular corrosion casting can be prepared by substituting lead methacrylate 2-ethylhexanoate for a proportion of the methyl methacrylate monomer normally used. Best results are achieved when conventional methacrylate resin is injected first to fill the vascular tree, and this is chased with the radio-opaque resin. The pattern of arterial and arteriolar distribution can then subsequently be followed by means of a radiographic survey of the cast, and this is of value prior to sampling from vascular systems which show functional subdivisions that cannot be correlated with any surface features. The radio-opacity of the resin and the quantity injected can be varied easily to suit individual requirements.