中国塑料 ›› 2008, Vol. 22 ›› Issue (08): 22-25 .DOI: 10.19491/j.issn.1001-9278.2008.08.005

• 材料与性能 • 上一篇    下一篇

热塑性木质素酚醛树脂固化动力学研究

胡立红,周永红,刘红军,张猛,刘欣
  

  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:2008-05-09 修回日期:1900-01-01 出版日期:2008-08-26 发布日期:2008-08-26

Curing Kinetics of Thermoplastic Novolac-type Lignin Phenolic Resin

HU Li一hong,ZHOU Yong-hong,LIU Hong-jun,ZHANG Meng,LIU Xin   

  1. Institute of Chemical Industry of Forest Products, C;hinase Academic of Forestry, Key and Open Lab on Forest Chemical Engineering, State Forestry Administration, Nanjing 210042,China
  • Received:2008-05-09 Revised:1900-01-01 Online:2008-08-26 Published:2008-08-26
  • Contact: ZHOU Yong-hong

摘要: 采用差示扫描量热法对热塑性木质素酚醛树脂(LDP)在25~250℃范围内,以5、10、15、20℃/min升温速率进行了动态固化反应研究。研究表明,随着升温速率的提高,树脂的起始固化温度Ti、峰顶温度Tp以及终了固化温度Tf均有提高,LDF的固化过程可以通过改变固化剂用量来优化固化行为,当固化剂用量达到12%(质量分数,下同)时其固化曲线与普通酚醛树脂固化曲线接近,且犜狆大幅降低(与普通酚醛树脂比较)。固化反应热随升温速率和固化剂用量的改变变化不明显。采用Ozawa方程对DSC数据进行动力学研究,得到LDF固化反应活化能为85.64KJ/mol

关键词: 热塑性, 木质素, 酚醛树脂, 固化动力学

Abstract: Differential scanning calorimetry (DSC) was used to study the curing behavior of lignin phe-nolic resin ( LPF) at heating rates of 5 , 10 , 15,and 20℃/min between 25℃and 250℃.八11 the ini-tial temperature T;,peak temperature Tp,and final temperature T} of curing increased with increasing heating rate. The curing behavior of LPF was affected by the amount of curing agent. When the content of curing agent was 12%,the curing behavior of LPF was similar to that of neat PF, but with a greatly lower TN. Little change in reaction heat was observed by altering heating rate and amount of curing agent. The kinetic analysis was performed by means of Ozawa equation and activation energy was obtained as 85 .64KJ/mol.

Key words: thermoplastic, lignin, phenolic resin, curing kinetics