南京林业大学学报(自然科学版) ›› 2008, Vol. 32 ›› Issue (05): 95-98.doi: 10.3969/j.jssn.1000-2006.2008.05.019

• 研究论文 • 上一篇    下一篇

用酸化油制备聚酯多元醇的研究

何琴玲,付云涛,从赫雷,林中祥*   

  1. 南京林业大学化学工程学院, 江苏 南京 210037
  • 出版日期:2008-10-18 发布日期:2008-10-18

Preparation of polyester polyols from acidic oil

HE Qin-ling, FU Yun-tao, CONG He-lei, LIN Zhong-xiang*   

  1. College of Chemical Engineering Nanjing Forestry University, Nanjing 210037, China
  • Online:2008-10-18 Published:2008-10-18

摘要: <正>应用正交试验研究了速生杨木单板的苯甲基化工艺,结果表明:反应温度对杨木单板苯甲基化的影响最为显著,NaOH用量影响较显著,反应时间对杨木单板苯甲基化影响不大。杨木单板苯甲基化的优选工艺为:反应温度120℃,NaOH质量分数15%,反应时间2h。在此工艺条件下,苯甲基化杨木单板的增重率达到64.9%。采用x-射线衍射仪和差示扫描量热仪分别对苯甲基化木材的微观结晶结构和热塑性能进行了分析,表明苯甲基化木材纤维素链之间的结晶结构已被破坏,温度较高时苯甲基化木材被软化,具有较好的热塑性。

Abstract: The polyester polyols were made by the addition reaction of acidic oil derived from garbage grease with maleic anhydride first. Then the esterification reaction with diethylene glycol was done. An optimal technologcial condition was obtained. The molar ratio of acidic oil: maleic anhydride: diethylene glycol was 1: 1: 3. 3. The maleic anhydride was added at the temperature of 180℃, 195--200℃and 200--220℃ respectively, and reacted for one hour each time. Then the reaction was kept for 0. 5h at 230--240℃. The last step was esterification for 10h at 240℃ in atmospheric pressure and esterification for I h at 240℃ in vacuum. The acid value of the polyester polyols was less than 1mg/g and the hydroxyl value was 250--300mg/g. The performance of the two-component polyurethane adhesive derived from the polyester polyols reached the cementaion requirements of color steel plates and polystyrene foam plastic. It had certain advantage in production and application.

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