Abstract: Arosin ester (RG) was made from rosin and glycidyl methacrylate (GMA). Radical homopolymerization of RG and copolymerization with styrene (St) in solution were carried out. The effects of reaction conditions,including raw material ratio,reaction temperature,initiator type and amount,on the polymerization were investigated. The homopolymer PRG and the copolymer P(RG-co-St) were characterized by Fourier transfer infrared spectrometer (FT-IR),thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC),respectively. The results showed that PRG and P (RG-co-St) were synthesized successfully,and AIBN was the best initiator for homopolymerization and copolymerization. With the increase of reaction temperature,the molecular weight (M_n) of the copolymer increased and the molecular weight distribution (MWD) was narrowed. With the increase of St loaded,the M_n of copolymer decreased but MWD was broadened. In addition,the copolymer had the similar initial decomposition temperature and higher the-most-decomposition- temperature,and the copolymer exhibited higher glass transition temperature than the homopolymer.

Key words: rosin, glycidyl methacrylate, styrene, homopolymerization, copolymerization

摘要： 利用松香与甲基丙烯酸缩水甘油酯(GMA)进行酯化反应,得到酯化产物(RG),然后进行了RG的自聚反应和与苯乙烯的共聚反应.利用红外光谱对产物结构进行表征,热重分析产物的热稳定性,差示扫描量热法测试产物的玻璃化转变温度,研究单体配比、反应温度、引发剂种类对RG与苯乙烯共聚反应产物分子量及其分布的影响.实验结果表明:成功合成了自聚物和共聚物;偶氮二异丁腈是共聚和自聚反应较优的引发剂;与苯乙烯共聚反应中,随着温度的升高,共聚物分子量增加,分子量分布变窄,随着苯乙烯用量的增大,共聚物分子量下降,分子量分布变宽;自聚物和共聚物的初始分解温度相近,但共聚物最大分解温度较高;共聚物的玻璃化转变温度高于自聚物.

关键词: 松香, 甲基丙烯酸缩水甘油酯, 苯乙烯, 自聚, 共聚