CAJ | 학술논문

为了制备聚合度大于3000的高聚合度聚乙烯醇，以生物醋酸乙烯为原料、偶氮二异丁腈为引发剂、甲醇为溶剂进行溶液聚合反应研究，考察了温度、搅拌转速、引发剂用量、甲醇用量和聚合时间对生物醋酸乙烯聚合反应的影响，采用正交试验法对生物醋酸乙烯溶液聚合的反应条件进行了筛选，并通过凝胶色谱对最优条件下制得的聚醋酸乙烯进行了分子量的测定。结果表明，最优的聚合反应条件为：聚合温度65℃，搅拌转速200 r/min，聚合时间2 h，甲醇用量10％，引发剂用量0.005％，所得的产品聚合度为3640；极差分析确定了影响聚醋酸乙烯聚合度的主次顺序为：甲醇用量、引发剂用量和聚合时间；由凝胶色谱分析可知，在最优条件下可以制备得到的聚醋酸乙烯分子量分布为1.2。说明以生物醋酸乙烯为原料进行溶液聚合可以得到高聚合度、分子量分布较窄的产品。
위료제비취합도대우3000적고취합도취을희순，이생물작산을희위원료、우담이이정정위인발제、갑순위용제진행용액취합반응연구，고찰료온도、교반전속、인발제용량、갑순용량화취합시간대생물작산을희취합반응적영향，채용정교시험법대생물작산을희용액취합적반응조건진행료사선，병통과응효색보대최우조건하제득적취작산을희진행료분자량적측정。결과표명，최우적취합반응조건위：취합온도65℃，교반전속200 r/min，취합시간2 h，갑순용량10％，인발제용량0.005％，소득적산품취합도위3640；겁차분석학정료영향취작산을희취합도적주차순서위：갑순용량、인발제용량화취합시간；유응효색보분석가지，재최우조건하가이제비득도적취작산을희분자량분포위1.2。설명이생물작산을희위원료진행용액취합가이득도고취합도、분자량분포교착적산품。
In order to obtain a polyvinyl alcohol ( PVA ) with polymerization degree greater than 3 000, solution polymerization was carried out using biorefined vinyl acetate as raw materials, azodi-isobutyronitrile ( AIBN) as initiator, methanol as solvent, respectively.The effects of temperature, stirring speed, initiator ratio, methanol dosage and polymerization time on the polymerization reac-tion of biorefined vinyl acetate were discussed systematically.Orthogonal experiments were estab-lished to get the optimum technological conditions of polymerization.The molecular weight of polyvi-nyl acetate(PVAc) were characterized by gel-chromatography (GPC).The results showed that, the optimum reaction conditions of polymerization were: reaction temperature 65 ℃, stirring speed 200 r/min, reaction time 2 h, methanol dosage 10%, initiator ratio 0.005%.Under the reaction conditions the polymerization degree of PVA could be 3 640.By orthogonal design method,the re-sults showed that the order of affecting polymerization degree were the methanol dosage, initiator ra-tio, reaction time.The GPC showed that the molecular weight distribution under the optimum poly-merization technique was 1.2.Solution polymerization with biological vinyl acetate ( VAc) as raw materials can get the products with higher polymerization degree and narrower molecular weight dis-tribution.