Study on Alternating Copolymerization of Polyester-amides

The preparing methods, choice of catalysts and reaction kinetics of one of the monomers, diesteramide(DEA), of polyester-amides were investigated in details. The chemical structure of DEA was analyzed. And the Polyester-amides ( PEA) were obtained by melt copolymerization with DEA. It is shown that DEA can be synthesized by DMT and hexamethylene diamine with the catalyst EX - 1 or EX - 2. The relationship between reaction rate of synthesizing monomer and concentration of hexamethylene diamine is first order kinetic relation.     

超声乳化-原位聚合法制备薄荷脑微胶囊

采用原位聚合法,结合超声乳化工艺,制备以薄荷脑为囊芯的微胶囊,并研究了反应条件对微胶囊形貌和粒径的影响.利用扫描电镜(SEM)、光学显微镜(OM)、傅里叶红外光谱(FT-IR)、差示扫描量热仪(DSC)、热重分析(TGA)、激光粒度测试等手段对薄荷脑微胶囊进行了结构和性能的表征.结果表明:所制得的薄荷脑微胶囊包覆良好,能够有效延缓薄荷脑的挥发和逸散;通过调节缩聚反应时间、薄荷脑添加量、反应温度可以得到粒径较为均一、分散性良好的微胶囊;在一定范围内,可以通过提高乳化剂质量浓度和超声功率来减小微胶囊粒径及其分布区间.     

纺丝机产量分析系统的研制

本系统将目前工程上实用的纺丝机产量分析进行了归纳和提练，建立了纺丝机的产量计算流程，可适用于各种纤维品种、线密度的产量分析和计算，能快速、准确、优质地计算设计参数和配置纺丝机关键组件。