DOP与CPE的含量对BaSO4填充聚氯乙烯基隔音复合材料性能的影响

将邻苯二甲酸二辛酯(DOP)与氯化聚乙烯(CPE)按照不同的质量份数加入到BaSO4填充聚氯乙烯基(PVC)隔音复合材料中,探讨DOP与CPE的含量对BaSO4填充聚氯乙烯基隔音复合材料隔声性能的影响,利用BSWA VS302USB双通道声学分析仪,万能材料试验机,动态热机械分析仪测试了材料的隔声性能,力学性能,阻尼性能。结果显示:当PVC相对质量为100份,DOP为50份,CPE为20份时对低频具有较好的隔声性能,当DOP相对质量为80份,CPE为20份时对中频具有较好的隔声性能,对高频影响较小。     

酞酸二丁酯表面印迹聚合物的合成及其吸附性能

以酞酸二丁酯(DBP)作为模板分子,甲基丙烯酸作为功能单体,乙二醇二甲基丙烯酸酯(EDMA)作为交联剂,在硅胶表面合成分子印迹聚合物(MIPs)。通过红外、热重分析、比表面积测定等对聚合物进行分析和表征;采用静态吸附法对水相中的印迹聚合物的吸附性能进行考察.红外结果表明硅胶表面存在对模板分子具有识别功能的官能团;热重分析证明其良好的热稳定性;通过测定计算印迹膜厚度;静态吸附实验说明印迹聚合物具有良好的吸附性能.     

我国合成邻苯二甲酸二丁酯用催化剂研究现状

评述了对甲苯磺酸、氨基磺酸、强酸性阳离子交换树脂、一水硫酸氢钠、五水四氯化锡、氧化锡、稀土化合物、杂多酸和相转移催化剂等催化剂催化合成邻苯二甲酸二丁酯的方法。     

反应精馏法催化合成邻苯二甲酸二异辛酯

研究了反应精馏法催化合成邻苯二甲酸二异辛酯系列工艺条件，发现该方法有生产工艺简单，反应条件温和，反应时间短，产品中副产物少，转化率高，产品质量较好，且可以在反应的同时，对产物进行有效的分离等优点。最佳工艺条件：催化剂硫酸的用量占总投料量的3‰、釜温控制178℃、柱温控制163℃，m（苯酐）：m（异辛醇）为1：2．7，回流比为1：1，反应时间为1．5h，反应床层高度为2．7m时，邻苯二甲酸酐的转化率可达到99％。     

水源水质受DEHP污染的粉末活性炭吸附处理工艺

采用含邻苯二甲酸二(2-乙基己基)酯(DEHP)的试验水样模拟城市取水水源发生DEHP水污染事故,测定粉末活性炭(PAC)对水样中DEHP的吸附性能,考察PAC炭种、吸附时间、DEHP初始浓度和PAC投加量等因素对DEHP的吸附量和脱除率的影响。试验结果表明:木屑PAC具有较大的比表面积,对DEHP具有良好的吸附效果,适用于DEHP水污染的应急处理。应急处理一般的DEHP水污染事故,DEHP污染浓度超标10～30倍时,PAC吸附DEHP的最佳条件为:吸附时间120 min,PAC投加量为20～80 mg/L,PAC对DEHP的吸附过程符合Henry等温式。     

Properties of novel diallyl phthalate resin modified with sulfur‐containing allyl ester compounds

Sulfur‐containing allyl ester, which reacts with diallyl phthalate (DAP) resin to have allyl groups, was synthesized by the reaction of allyl phthalic acid with bisphenol having sulfur atoms. The sulfur‐containing allyl ester compound was blended with DAP resin to improve the adhesive properties to copper. By modification with sulfur‐containing allyl ester compound, the T‐peel adhesive strength and the lap shear adhesive strength to copper was improved. In particular, the adhesive strength was greatly improved when the resin was modified with the allyl ester compound having a disulfide bond (?S?S?) (DADS). It is concluded that this result is due to the improvement of the interfacial adhesive strength because the sulfur atom was found to be located in the surface of the copper by Fourier transform infrared (FTIR) analysis. The glass transition temperature (T_g) and the thermal decomposition temperature (T_d) of the cured DAP resin modified with DADS slightly decreased with increasing concentration of DADS. The lowering of T_g is because the crosslinking density of the DAP resin modified with DADS is smaller than that of DAP resin. Moreover, from thermogravimetric analysis, the lowering of Td of the DAP resin modified with DADS is because DADS is likely to pyrolyze. © 2013 Society of Chemical Industry     

A Comparison of the Migration of ‘Spiked’ and ‘Intrinsic’ Substances from Paper and Board into Raisins and into Tenax as a Food Simulant

Four samples of paper and board (P/B) of a type used for packaging dry foods were subjected to migration experiments using raisins and the polymeric powder Tenax as a food simulant. The P/B samples contained only low levels of diisopropylnaphthalene (DiPN) and diisobutyl phthalate (DiBP), and so, experiments were also conducted after spiking the P/B with added model substances. These were o‐xylene, acetophenone, dodecane, benzophenone, DiPN and DiBP. Migration experiments into raisins and Tenax were conducted for 10 days at 40°C. Migration levels depended strongly on the nature of the substance. Migration from spiked P/B samples was more extensive (as a percentage of that available) than migration of intrinsic migratable substances, and so, studying spiked samples tends to be conservative. It is considered likely that this is because of binding of substances, especially aromatics with pi‐electrons such as DiPN and DiBP, to active sites on the surface of P/B fibres, resulting in non‐linear absorption isotherms. However, further work would be needed to prove this conclusively. Considering the results overall and also that raisins packed in P/B can have a shelf life of up to 1 year at ambient temperatures, the test results using Tenax as a food simulant are considered to be appropriate without application of a correction factor. Copyright © 2014 John Wiley & Sons, Ltd.     

新型增塑剂——二甘醇双[邻苯二甲酸二丁酯]的合成与应用

本文对增塑剂邻苯二甲酸二丁酯进行了改性,合成了一种比邻苯二甲酸二丁酯性能更优异,成本更低廉的新型增塑剂——二甘醇双[邻苯二甲酸二丁酯].确定了最佳反应条件为反应温度125～135℃,配料比1∶2,催化剂用量0.3%,并将二甘醇双[邻苯二甲酸二丁酯]的性能与通用增塑剂邻苯二甲酸二丁酯和邻苯二甲酸二辛酯进行了比较.     

我国对邻苯二甲酸酯类化合物检测方法的研究现状

邻苯二甲酸酯类作为塑料添加剂有80年的历史,很容易迁至食品和环境中,影响人类的身体健康。本文对邻苯二甲酸酯类化合物检测方法做了总结,为进一步认识邻苯二甲酸酯类化合物提供参考。     

新型UV固化可剥性金属涂料的合成及性能研究

选用乙醇为溶剂,偶氮二异丁腈(AIBN)为引发剂,引发邻苯二甲酸二烯丙酯(DAP)聚合。聚合工艺为DAP100g,乙醇30g,AIBN2g,反应温度为80℃,反应时间约4h。反应过后,DAP的收率达29.7%,聚合物是可溶的预聚体。预聚体的凝胶色谱、红外谱图及碘值都显示其具备进一步交联固化的潜力。然后,以合成的邻苯二甲酸二烯丙酯预聚体(P-DAP)为主要成膜物,二缩三丙二醇二丙烯酸酯(TPGDA)为活性稀释剂,双(2,4,6-三甲基苯甲酰基)苯基氧化膦(BAPO)为光引发剂,制备出新型的紫外光固化可剥性涂料。固化后的涂层具有良好的柔韧性、硬度、耐水、耐酸碱、耐汽油的性能,并且可剥性较好。