β-石竹烯-马来酸酐共聚物的合成与表征

Synthesis and Characterization of β-Caryophyllene-Maleic Anhydride Copolymer

以β-石竹烯和马来酸酐为原料,环己酮为溶剂,在过氧化二叔丁基(DTBP)的作用下,合成了β-石竹烯-马来酸酐共聚物(BCPMA)。探讨了反应温度,反应时间,单体物质的量比,溶剂用量以及引发剂用量对BCPMA产率的影响,并采用FTIR,1HNMR,GPC,元素分析对BCPMA的结构进行了表征,利用热重分析(TG)测定了BCPMA的热稳定性。结果表明:当反应温度145℃,反应时间1 h,n(马来酸酐):n(β-石竹烯)=2∶1,m(环己酮):m(β-石竹烯)=2∶1,DTBP加入量为4.5%(以β-石竹烯质量为基准,下同)时,BCPMA的产率最高,为92.9%。该共聚物的起始分解温度为370.6℃,具有较高的热稳定性能。

β-caryophyllene-maleic anhydride copolymer（BCPMA） was synthesized by using β-caryophyllene and maleic anhydride as raw material with di-tert-butyl peroxide（DTBP） as initiator and cyclohexanone as solvent. The effects of reaction temperature,reaction time,molar ratio of monomers,the amount of solvent and the amount of initiator on the yield of the copolymer were discussed. The structure of the polymer was characterized by FTIR,~1HNMR,GPC and elemental analysis. Thermal stability of the polymer was determined by thermal gravimetric analysis（TG）. The results showed that when the conditions of reaction temperature 145 ℃,reaction time 1 h,molar ratio of maleic anhydride to β-caryophyllene 2∶1,mass ratio of cyclohexanone to β-caryophyllene 2∶1 and initiator dosage 4. 5%,the yield of copolymer can reach 92. 9%. The initial decomposition temperature of the copolymer was370. 6 ℃,which indicated that it had high thermal stability.