复合改性酚醛树脂热降解过程的研究  

Study on Thermal Degradation of Composite Modified Phenolic Resins

作　　者：陈智琴[1] 陈鸯飞[2] 李文魁[1] 刘洪波[2] 

机构地区：[1]江西科技师范大学江西省材料表面工程重点实验室,江西南昌330013 [2]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《中国材料科技与设备》2014年第1期18-20,共3页Chinese Materials Science Technology & Equipment

摘　　要：采用综合热分析技术考察了氨酚醛树脂（PF1．2）、两种硼改性酚醛树脂（BPF1、BPF2）和两种复合改性酚醛树脂（水杨醛改性BPF1、苯甲醛改性BPF1）的热降解过程，利用红外光谱技术研究了热降解过程中五种树脂结构的变化规律，以期指导成炭率高、热稳定性好的复合改性酚醛树脂的合成。结果表明：在酚醛树脂结构中引入硼酸，改变了其分子结构，生成了键能较高的硼酯键，提高了酚醛树脂的高温成炭率；两种复合改性酚醛树脂通过向硼酚醛树脂BPF1中分别引入含有芳环结构的水杨醛和苯甲醛，形成了新的共轭结构，改善了酚醛树脂的热稳定性，提高了其成炭率。In this paper, the ammonia catalyzed resin （PF1.2）, resins modified by boric acid （BPF1 and BPF2） and two composite modified resins were studied by thermo--gravimetric analysis. Their structural changes during thermal degradation were investigated by means of Fourier--transform infrared （FTIR）. The results show that the resins modified by boric acid alters molecular structure and forms the B--O bond with high bond energy, which improves char yield of phenolic resin. The formation of conjugate structure by addition of saticylicaldehyde and benzaledhyde in two composite modified resins improves the thermal stability and increases the char yield.

关 键 词：酚醛树脂 硼酚醛树脂 复合改性 热降解 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]