涂层剖析方法探讨

进行纺织品或纸张上涂层的剖析,关键是对涂层进行恰当的分离。通过对进口高光泽纸涂层的剖析,获得结论是:应用多种溶剂连续抽提和柱层析分离法能取得较满意的剖析结果。本方法对于纺织品涂层的剖析也有参考价值。     

EFFECT OF LITHIUM-BASE CATALYST ON THE RATE OF TRANSESTERIFICATION OF DMT WITH EG AND ON THE QUALITY OF PET

New catalysts combined with an organic or inorganic lithium salt (lithium acetate or lithiumchloride) and a conventional catalyst for the transesterification of dimethyl terephthalate withethylene glycol have been studied. Reaction mechanism in presence of lithium-base catalyst hasbeen proposed. A synergistic action of two classes of catalysts creates the speed-up of initial re-action particularly in presence of lithium acetate. The presence of lithium base catalyst can re-duce diethylene glycol content and raise the melting point of final PET product, but almostuneffect PET molecular weight distribution.     

FS纺纱锭子油的研究

长期以来,纺纱锭于一直使用矿物油作为润滑剂和起吸振作用.但这种油的(?)份轻、蒸发大.油性欠佳。本文从节能的角度出发,研制出一种FS合成锭子油,它以现在常用的矿物锭子油为基础,加入适量的添加剂,改善了矿物油的不足,降低了锭子的功率消耗,延长了加油周期。同时,FS油配制方便,价格低廉,具有很大的推广价值。