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本文以未漂的马尾松磨木浆粕作为木质纤维素原料,研究了以高锰酸钾为引发剂引发羟丙基马尾松磨木浆粕与丙烯腈接枝共聚的基本反应规律,讨论了各种反应参数对接枝共聚反应的影响。探讨了原料中的木质素在高锰酸钾引发体系中的影响和作用机理,初步得出在该引发体系中木质素对接枝共聚反应的影响,主要是由于木质素结构中的酚型结构单元和结构单元侧链上的羟基(可能主要是较活泼的α-羟基)所造成,可通过适当的醚化反应或氧化作用来消除。接枝共聚物的 X-射线衍射分析发现,当接枝增量超过98%以后,纤维素的结晶衍射峰已基本消失,究其原因可能是马尾松磨木浆粕经羟丙基醚化后,接枝共聚反应可以渗透到晶区内部,随接枝增量的提高,具有一定的消晶作用。
In this paper, the unbleached masson pine wood pulp as lignocellulosic raw material, with potassium permanganate as initiator initiator hydroxypropyl masson pinewood pulp and acrylonitrile graft copolymerization of the basic reaction rules are discussed Effect of various reaction parameters on graft copolymerization. The effect and mechanism of lignin in the initiator system of potassium permanganate were discussed. The influence of lignin on the graft copolymerization in the initiator system was primarily obtained, mainly due to the phenolic structure in the lignin structure The hydroxyl groups (which may be mainly the more reactive α-hydroxyl groups) in the units and the side chains of the building blocks can be eliminated by appropriate etherification or oxidation. X-ray diffraction analysis of the graft copolymer showed that the crystalline diffraction peak of cellulose disappeared after the grafting amount increased more than 98%, probably due to the hydroxypropyl etherification of the masson pinewood pulp , The graft copolymerization can penetrate into the crystal region, with the grafting increment increased, with a certain role in de-crystallization.