聚合松香HEMA酯化物与苯乙烯的共聚研究
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摘要
以聚合松香(PR)与甲基丙烯酸-β-羟乙酯(HEMA)的酯化物(PRH)为单体,采用自由基溶液聚合方法制备了PRH与苯乙烯(St)的共聚物(PRHS)。探讨了单体比例、反应温度、引发剂用量和反应时间对共聚反应的影响。用红外光谱、热重分析和差示扫描量热分析对产物的结构、热稳定性和玻璃化转变温度进行了测试表征。结果表明:成功合成了酯化物PRH与St的共聚物PRHS;共聚物的热稳定性高于酯化物,苯乙烯用量越多,共聚物热稳定性和玻璃化转变温度越高;PRH与St共聚较佳的反应条件为:mPRH∶mSt=1∶2;反应温度为110℃;m(引发剂)∶m(单体)=1%;反应时间为8 h,在此条件下,产率达70.14%。
A copolymer(PRHS) was prepared from styrene(St) and polymerized rosin ester(PRH),which was a product via esterification of polymerized rosin(PR) and 2-hydroxyethyl methacrylate(HEMA),via free radical solution copolymerization.The effects of monomer ratio,reaction temperature,initiator level and reaction time on copolymerization were studied.The molecular structures,thermal stabilities,and the glass transition temperatures(Tg) of the products were characterized by Infrared spectroscopy,thermal gravimetric analysis and differential scanning calorimetry.The results show that PRHS was prepared successfully.The thermal stability of the copolymer was better than the ester.With the increase of St level,the thermal stability and Tgof the copolymer improved.The yield could reach to 70.14% with the optimal reaction time of 8 h and temperature of 110 ℃ at the weight ratio of PRH to St of 1∶ 2 and the initiator amount of 1%(based on monomer).
A copolymer(PRHS) was prepared from styrene(St) and polymerized rosin ester(PRH),which was a product via esterification of polymerized rosin(PR) and 2-hydroxyethyl methacrylate(HEMA),via free radical solution copolymerization.The effects of monomer ratio,reaction temperature,initiator level and reaction time on copolymerization were studied.The molecular structures,thermal stabilities,and the glass transition temperatures(Tg) of the products were characterized by Infrared spectroscopy,thermal gravimetric analysis and differential scanning calorimetry.The results show that PRHS was prepared successfully.The thermal stability of the copolymer was better than the ester.With the increase of St level,the thermal stability and Tgof the copolymer improved.The yield could reach to 70.14% with the optimal reaction time of 8 h and temperature of 110 ℃ at the weight ratio of PRH to St of 1∶ 2 and the initiator amount of 1%(based on monomer).
引文
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[11]余彩莉,王孝磊,孙发孟,等.马来松香HEMA酯化物共聚研究[J].桂林理工大学学报,2014,34(1):125-129.
[12]武安福,余彩莉,张发爱.聚合松香与HEMA的酯化及其自聚研究[J].中国胶粘剂,2013,22(4):1-4.
[2]万福成,赵永和,徐启杰.聚合松香的制备及其含量测定[J].化学研究,2007,18(3):30-33.
[3]华杰,徐盛明,张清,等.聚合松香改性酚醛树脂的合成[J].高分子材料科学与工程,2007,23(5):72-75.
[4]Liu S W,Xie C X,Yu S T,et al.Dimerization of rosin using Bronsted-Lewis acidic ionic liquid as catalyst[J].Catalysis Communications,2008,9(10):2030-2034.
[5]Fulzele S V,Satturwar P M,Dorle A K.Novel biopolymers as implant matrix for the delivery of ciprofloxacin:Biocompatibility,degradation,and in vitro antibiotic release[J].Journal of Pharmaceutical Sciences,2007,96(1):132-144.
[6]Chen P X,Zeng X R,Li H Q,et al.Preparation and characterization of polyacrylate/polymerized rosin composite emulsions by seeded semicontinuous emulsion polymerization[J].Journal of Applied Polymer Science,2012,124(6):4694-4701.
[7]Satturwar P M,Fulzele S V,Dorle A K.Evaluation of polymerized rosin for the formulation and development of transdermal drug delivery system:A technical note[J].AAPS PharmSciTech,2005,6(4):E649-E654.
[8]余彩莉,赵烈,张发爱.氢化松香与HEMA酯化物自聚与共聚研究[J].化学研究与应用,2009,21(6):801-804.
[9]宫青海,余彩莉,张发爱.松香丙烯酸基二元单体与苯乙烯的共聚反应[J].化学研究与应用,2011,23(3):289-294.
[10]余彩莉,张发爱,陈林.松香顺酐加成物与甲基丙烯酸-β-羟乙酯的酯化反应[J].桂林工学院学报,2008,28(3):492-496.
[11]余彩莉,王孝磊,孙发孟,等.马来松香HEMA酯化物共聚研究[J].桂林理工大学学报,2014,34(1):125-129.
[12]武安福,余彩莉,张发爱.聚合松香与HEMA的酯化及其自聚研究[J].中国胶粘剂,2013,22(4):1-4.