摘要
以蓖麻油(CO)、甲基丙烯酸甲酯(MMA)为原料,偶氮二异丁腈(AIBN)为引发剂,甲苯为溶剂,无水无氧条件下合成了蓖麻油-甲基丙烯酸甲酯共聚物(PCOM)。利用FTIR表征了PCOM的结构,用凝胶渗透色谱(GPC)测定了共聚物的相对分子质量及其分布,并对其降凝性能进行评价。结果表明,当m(CO)∶m(MMA)=1∶1、引发剂AIBN用量(以单体总质量为基准,下同)为0.25%、反应时间为8 h、反应温度为80℃时,产率为59.20%,共聚物数均相对分子质量为2.722×10^(5),分子量分布较窄(PDI=1.51)。且共聚物对润滑油具有一定降凝效果,当共聚物添加量(以油品质量为基准,下同)为0.5%时,凝点(SP)可降低10℃(ΔSP=10℃)。
Castor oil-methyl methacrylate copolymer was synthesized from castor oil(CO)and methyl methacrylate(MMA)by using azodiisobutyronitrile(AIBN)as initiator,toluene as solvent under an anhydrous and anaerobic condition.The structure of copolymer was characterized by FTIR.The relative molecular mass and its distribution of the copolymer were determined by gel permeation chromatography(GPC).The performance of its pour point depression was also evaluated.The results showed that under the conditions of m(CO)∶m(MMA)=1∶1,AIBN dosage of 0.25%(based on the total mass of monomers,the same below),at 80℃for 8 h,the copolymer had a yield of 59.20%,average relative molecular weight of 2.722×10^(5)and exhibited narrow relative molecular weight distribution(PDI=1.51).When the additive amount of copolymer was 0.5%(based on the mass of oil product,the same below),the pour point of the lubricating oil could decreased by 10℃,indicating that the copolymer had a certain effect of lowering pour points(ΔSP=10℃).
作者
丁丽芹
念利利
冯豪
梁生荣
DING Liqin;NIAN Lili;FENG Hao;LIANG Shengrong(College of Chemistry&Chemical Engineering,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China;Modern Analysis&Testing Center,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2021年第3期619-624,共6页
Fine Chemicals
基金
国家自然科学基金项目(21703169)
陕西省自然科学基础研究计划项目(2018JM2035)
西安石油大学青年科研创新团队项目(2019QNKYCXTD16)
西安石油大学研究生创新与实践能力培养计划资助项目(YCS19112032,YCS20211008)。
关键词
蓖麻油
甲基丙烯酸甲酯
共聚物
降凝剂
蜡晶形貌
油田化学品
castor oil
methyl methacrylate
copolymer
pour point depressant
wax crystal morphology
oil field chemicals
