废次烟叶绿原酸提取物的纯化

考察了聚酰胺树脂层析时上柱液浓度、洗脱剂浓度与用量及乙酸乙酯萃取时料液pH值、萃取次数与时间对废次烟叶中绿原酸纯化效果的影响.结果表明:①19.8 mL聚酰胺树脂玻璃柱(16 mm×200 mm)层析的适宜条件为:上柱液浓度8.5 mg/mL,洗脱剂198.0 mL 25％乙醇;②萃取条件为:料液pH2.0,萃取2次,萃取时间5 min.采用上述条件,可得到纯度82.1％的绿原酸产品,得率为57.6％.     

锦棉交织物活性染料—浴法染色工艺

分析了锦棉交织物一浴法染色工艺中存在的主要问题,通过选用实验室 研制的助剂CN和合适的活性染料,优化了锦棉交织物活性染料一浴法染色条件。     

100tex紬锦混纺针织纱的研制

以绢纺Ｂ３１１精梳机的落绵（７８％）与锦纶短纤维（２２％）两种纤维，在丝纺设备上纺制１００ｔｅｘ（１０Ｎｍ／１）由锦混纺针织纱。文章针对绢纺落绵与锦纶短纤维的各自特点，介绍在混纺成纱各工序中工艺参数的选择和必须注意的问题，指出其生产关键在于两种纤维的均匀和及回潮率的控制。     

二次柱层析制备高纯度表没食子儿茶素没食子酸酯(EGCG)的工艺研究

以商品荼多酚为原料,先用聚酰胺柱层析预分离表没食子儿茶素没食子酸酯(EGCG),再用硅胶柱层析制备高纯度的EC-CG.采用此工艺条件,利用较低等级的商品茶多酚(70%TP)可以制备出纯度达98%以上的EGCG.     

锦棉弹力闪光织物的染整工艺

锦棉弹力闪光交织物经向为棉纶有光丝，纬向为棉氨纶包芯纱。前处理前应先经预定形，以减少皱印；采用冷轧堆前处理、中性/直接混纺染料或活性染料一浴法染沟；定形温度不宜高，或两次定形。整个染整加工宜采用松式或低张力工艺，以确可产品的质量和风格。     

人丝/锦纶花色纱一浴法染色工艺的探讨

在对人造丝和锦纶两种纤维形态结构及染色性能分析的基础上，从染料、助剂及染浴条件等方面阐述了一浴两步法染色工艺的可行性，并给出具体染色工艺。     

聚酰胺合金研究进展

介绍了聚酰胺合金的开发现状、相容化技术、主要性能及应用领域。探讨了聚酰胺合金今后的发展趋势。     

Ultraviolet Oxidative Stabilization Effect of the Rare Earth Compound on Polyamide

Rare earth compounds, including rare earth stearate (RESt) and rare earth epoxydised fatty acid (REEFA), were applied for the purpose of further improving the ultraviolet-oxidative stability of polyamide (PA6). The results showed that the rare earth compounds can inhibit the increase of the gel concentration and the reduced viscosity, the formation and the increase of the carboxylic group concentration, and the decrease of the terminal amine group concentration on the molecular chain of PA6, and delay the decrease of the mechanical properties of PA6 during the UV aging. The sample of PA6 with the rare earth compounds had higher absorbance and lower transmittance of ultraviolet band compared with pure PA6, indicating that the rare earth compounds can protect PA6 from ultraviolet degradation.     

Activation of the hydrolytic polymerization of ε-caprolactam by ester functions: Straightforward route to aliphatic polyesteramides

The hydrolytic polymerization of ε-caprolactam (CLa) was carried out in bulk (in absence of solvent) at 250 °C in the presence of carboxylic esters and aqueous H₃PO₂. It turned out that by conducting the ring opening polymerization (ROP) of CLa in the presence of PEO–C(O)–O–C₅H₁₁, a selected model ester (PEO = poly(ethylene oxide)), a remarkable activating effect of the ester function on the hydrolytic polymerization of the lactam was observed yielding PEO–b–PCLa diblock copolymers. The comparison of the CLa monomer conversions obtained with or without the model ester activated by H₃PO₂, as determined by ¹H NMR spectroscopy, has enabled to propose a multi-step mechanism in which three major reactions occurred: (i) ester and lactam hydrolysis, (ii) aminolysis of the carboxylic ester by the resulting primary amine of the hydrolyzed/opened lactam ring and (iii) condensation reactions between carboxylic acids and both amine/hydroxyl functions. The overall result of this multi-step mechanism can be assimilated as an “insertion” of the opened lactam into the ester function. By conducting the hydrolytic polymerization of CLa in the presence of an aliphatic polyester chain, such as poly(ε-caprolactone) (PCLo), polyesteramides were recovered with high yields and random distributions of the CLa and CLo repetitive units as determined by ¹³C NMR.     

低分子聚酰胺热熔粘合剂的研究

以 0 1 0树脂为基本原料 ,经过接枝、交联改性 ,合成出一种软化点高 ,粘度适中 ,粘接强度大 ,电性能优异的韧性难燃聚酰胺热熔粘合剂。