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林产化学与工业

林产化学与工业 ›› 2008, Vol. 28 ›› Issue (5): 11-15.

• 研究报告 • 上一篇    下一篇

醋酸丙酸纤维素的合成及结构研究

段丽艳, 金立维, 曹珍艳, 许玉芝, 王春鹏, 储富祥   

  1. 中国林业科学研究院 林产化学工业研究所;国家林业局 林产化学工程重点开放性实验室, 江苏, 南京, 210042
  • 收稿日期:2008-01-08 修回日期:1900-01-01 出版日期:2008-10-30 发布日期:2008-10-30
  • 通讯作者: 储富祥,研究员,博士生导师,从事生物质材料、高分子乳液及胶黏剂研究。

Study on Synthesis and Structure of Cellulose Acetate Propionate

DUAN Li-yan, JIN Li-wei, CAO Zhen-yan, XU Yu-zhi, WANG Chun-peng, CHU Fu-xiang   

  1. Institute of Chemical Industry of Forest Products, CAF;Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, China
  • Received:2008-01-08 Revised:1900-01-01 Online:2008-10-30 Published:2008-10-30

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摘要： 采用非均相催化酯化法合成了醋酸丙酸纤维素(CAP),对合成的CAP的13C NMR图谱进行了分析,分别得出了CAP的乙酰基和丙酰基的取代度,并与化学滴定方法进行了对比.采用IR、凝胶渗透色谱(GPC)、X射线衍射和差示扫描量热法(DSC)等检测手段对产物的结构和性能进行了表征.结果表明,与纤维素相比,所合成的CAP的晶型发生了明显的变化,结晶度从68%降到了30%～40%,玻璃化转变温度为150℃左右.纤维素的酯化使其具有改善的塑化性能.

关键词: 醋酸丙酸纤维素, 13C NMR, X射线

Abstract: Cellulose acetate propionate (CAP) was synthesized through heterogeneous esterification of cellulose. The substituting degree of CAP was determined by 13C NMR and chemical titration. The structure and properties of CAP were investigated by IR, gel permeation chromatography (GPC), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The results showed that the crystallinity of CAP was decreased from 68% to 30%-40%, and the glass transition temperature was about 150℃. The plasticizing properties after esterification have been improved.

Key words: cellulose acetate propionate, 13C NMR, X-ray

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