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采用聚乙烯醇(PVA)与脂肪醇进行醚化接枝反应,通过红外光谱分析和对接枝聚合物耐水性能测试研究了从不同的脂肪醇,反应温度、反应时间及反应物配比对产物的影响。通过正交实验方法确定了最佳反应条件:以浓H2SO4为催化剂,二甲亚砜为醚化溶剂、正辛醇为醚化剂,醚化反应温度120℃、反应时间2h、PVA与正辛醇物质的量比为1∶1.2。在此反应条件下合成的接枝聚合物耐水性能最好,蒸馏水抽提后的余重高达98.03%,属高耐水性树脂。
Polyvinyl alcohol (PVA) and fatty alcohol were used for the etherification grafting reaction. The infrared spectra and the water resistance of the grafted polymer were tested. The effects of different fatty alcohols, reaction temperature, reaction time and reactant ratio on the product Impact. Orthogonal experimental method was used to determine the best reaction conditions: concentrated H2SO4 as catalyst, dimethyl sulfoxide as etherification solvent, n-octanol as etherification agent, etherification reaction temperature of 120 ℃, reaction time of 2h, PVA and Zhengxin The amount of alcohol material is 1: 1.2. Under the reaction conditions, the grafted polymer has the best water resistance, the residual weight after distilled water extraction is as high as 98.03%, which belongs to the high water-resistant resin.