增塑剂DOP对紫外光固化胶粘剂性能的影响

采用邻苯二甲酸二辛酯(DOP)做增塑剂,加入到聚氨酯丙烯酸酯紫外光(UV)固化胶粘剂中,发现DOP对胶粘剂具有良好的稀释增塑作用。通过透射电镜(TEM)照片发现,部分增塑剂DOP以微小的团聚体分散在固化后的体系当中。DOP的加入能降低胶粘剂的初始施工黏度,同时胶粘剂的拉伸剪切强度降低,而不均匀扯离强度增大。DOP的加入使胶粘剂固化后的交联密度降低,而玻璃化温度(Tg)先明显降低后又有所升高。胶粘剂固化后放置一段时间,其强度还会上升。     

High active alkyldimethylamine oxides

A recently developed, high active, alkyldimethylamine oxide powder now permits the use of this valuable surfactant in water-sensitive formulations such as bar soaps. Study of the various amine oxide homologs in key performance properties of soap bars showed them to be effective foam modifiers, plasticizers, and synergistic lime soap dispersants. The solid amine oxides were found to be a versatile additive which could readily be formulated into a wide variety of personal care bars.     

TPA下脚料合成增塑剂DOTP

以对苯二甲酸（ＴＰＡ）下脚料和２－乙基己醇为原料，在钛酸四丁酯作催化剂的条件下，采用直接酯化法制取对苯二甲酸二辛酯（ＤＯＴＰ）；确定了合成工艺的最佳操作条件。产品质量符合７０℃级电缆料的技术指标     

提高高级象牙瓷成坯率的研究

本研究对高级象牙瓷坯泥的增塑与半成品的工艺控制进行了系列试验，使大件产品成坯率由２０％提高到８０％以上。     

偏苯三甲酸酐与2-乙基己醇非酸催化酯化合成偏苯三甲酸三(2-乙基己)酯

偏苯三甲酸酐与2-乙基己醇在非酸催化剂作用下,摩尔比为1:4,反应温度210℃,经过3小时醇化反应,经脱醇、脱色、过滤得产品偏苯三甲酸三(2-乙基己)酯。产品酸值小于0.2,皂化值307±3,铂-钴色号小于45。本合成路线较传统的硫酸法不需中和水洗,简化了工艺过程,减少了设备的腐蚀和废水排放等。测得酯化反应为不可逆一级反应,活化能E=76.041kJ/mol,210℃酯化反应速度常数k_(210)=3.503h~(-1)。     

增塑剂对高直链淀粉基生物降解薄膜力学性能的影响

以高直链玉米淀粉为原料,利用微波辐射加热工艺将淀粉糊化,通过溶液浇铸法制备淀粉基薄膜。探讨了不同增塑剂以及复合增塑剂对高直链淀粉基薄膜性能的影响。结果表明,甘油、山梨醇和木糖等增塑剂对淀粉的塑化作用是比较显著的。与单一的增塑剂相比,复合增塑剂所制备的材料的力学性能更加优良,尤其是甘油与木糖复合增塑所制备的淀粉基薄膜性能更好。     

LTCC流延生瓷带的力学性能

选择邻苯二甲酸二丁酯(DOP)和聚乙二醇(PEG)作为复合增塑剂,采用流延法制备生瓷带。研究复合增塑剂中PEG和固含量对浆料黏度及生瓷带力学性能的影响。结果表明,复合增塑剂的增塑效果优于单组分增塑剂。随着PEG含量的增加,生瓷带拉伸强度减小,断裂伸长率先增大后减小;生瓷带的拉伸强度和断裂伸长率随固含量的升高而降低。当增塑剂中w(PEG)为30.0%～70.0%,w(固含量)为86.5%～87.3%时,生瓷带拉伸强度约为1.94MPa,断裂伸长率约为12.07%。     

N-(2-Hydroxyethyl)formamide as a new plasticizer for thermoplastic starch

N-(2-Hydroxyethyl)formamide (HF) was synthesized efficiently and used as a new plasticizer for corn starch to prepare thermoplastic starch (TPS). The hydrogen bond interaction between HF and starch was proved by Fourier-transform infrared (FT-IR) spectroscopy. Scanning electron microscope (SEM) revealed that starch granules were completely disrupted and a continuous phase was obtained. The crystallinity of corn starch and HF-plasticized TPS (HTPS) were characterized by X-ray diffraction (XRD). The glass transitions of glycerol-plasticized TPS (GTPS) and HTPS were investigated by differential scanning calorimetry (DSC). The water resistance of GTPS was better than that of HTPS. In addition, the flexibility of HTPS was better than that of GTPS at low relative humidity.     

聚氯乙烯滴灌带的研究及应用

探讨了PVC滴灌带复合材料的配方、工艺及制备方法;获得了PVC滴灌带加工的最佳工艺配方。     

PVC中增塑剂迁移和抽出问题

讨论了聚氯乙烯（PVC）中增塑剂抽出和迁移的危害性和基本原理,重点介绍了影响增塑剂抽出和迁移的主要因素,如：增塑剂相对分子质量和分子结构、环境温度、增塑剂含量、介质和时间。归纳总结了各种能有效抑制PVC中增塑剂抽出及迁移问题的解决办法及研究成果,主要为添加聚酯增塑剂、添加纳米粒子、使用离子液体、表面改性、表面交联、表面喷涂防护涂层等。