不同溶剂中的苯乙烯-马来酸酐共聚研究
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摘要
以偶氮二异丁腈为引发剂,分别以乙酸乙酯、N,N-二甲基甲酰胺、甲苯为溶剂,通过改变苯乙烯与马来酸酐的投料摩尔比,探究了苯乙烯-马来酸酐(PSMA)共聚物的合成条件对共聚物中马来酸酐单元含量的影响。利用傅立叶变换红外光谱、核磁共振氢谱、凝胶渗透色谱和热失重对共聚产物进行了表征。结果表明:以甲苯为溶剂进行沉淀聚合反应,苯乙烯和马来酸酐投料摩尔比为1∶1时,通过核磁共振氢谱计算所合成的PSMA共聚物中马来酸酐单元质量分数为46.42%,产率为75%;通过GPC测得共聚产物的重均分子量为79 697。合成的PSMA是一种低聚合度、高马来酸酐单元含量的共聚物。
Poly(styrene-co-maleic anhydride)(PSMA) copolymer was prepared in three solvents(ethylacetate,N,N-dimethylformamide and toluene)with azodiisobutyronitrile as an initiator. Effect of synthesisconditions such as the feed mole ratio of styrene to maleic anhydride on the content of maleic anhydride units inthe copolymers was investigated. The copolymerization products were characterized by Fourier transforminfrared spectroscopy,nuclear magnetic resonance spectroscopy,gel permeation chromatography andthermogravimetric analysis. The results show that when the mole ratio of styrene to maleic anhydride is 1∶1 withtoluene as a solvent of precipitation polymerization,the mass fraction of maleic anhydrideunits in the synthesizedPSMA is 46.42% and the yield is 75% calculated by nuclear magnetic resonance spectroscopy. The weight-average relative molecular mass of the product is 79 697 determined by gel permeation chromatography. Thesynthesized PSMA is a copolymer with low degree of polymerization and high content of maleic anhydrideunits.
Poly(styrene-co-maleic anhydride)(PSMA) copolymer was prepared in three solvents(ethylacetate,N,N-dimethylformamide and toluene)with azodiisobutyronitrile as an initiator. Effect of synthesisconditions such as the feed mole ratio of styrene to maleic anhydride on the content of maleic anhydride units inthe copolymers was investigated. The copolymerization products were characterized by Fourier transforminfrared spectroscopy,nuclear magnetic resonance spectroscopy,gel permeation chromatography andthermogravimetric analysis. The results show that when the mole ratio of styrene to maleic anhydride is 1∶1 withtoluene as a solvent of precipitation polymerization,the mass fraction of maleic anhydrideunits in the synthesizedPSMA is 46.42% and the yield is 75% calculated by nuclear magnetic resonance spectroscopy. The weight-average relative molecular mass of the product is 79 697 determined by gel permeation chromatography. Thesynthesized PSMA is a copolymer with low degree of polymerization and high content of maleic anhydrideunits.
引文
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[2]高嫄,黄发荣.苯乙烯-马来酸酐共聚物的生物降解性研究[J].功能高分子学报,2005,17(2):267-271.
[3]ZHOU Y,YU D,XI P,et al.Influence of styrene-maleic anhydride copolymers on the stability of quinacridone red pigment suspensions[J].Journal of Dispersion Science&Technology,2003,24(5):731-737.
[4]陈谷峰.梳状SMA接枝共聚物的设计合成及其对聚乙烯的表面改性研究[D].广州:中山大学,2004.
[5]刘廷国,刘天宝,汪新,等.低相对分子质量苯乙烯-马来酸酐交替共聚物的合成[J].分子科学学报,2017,33(2):138-145.
[6]闵邓昊.松节油中倍半萜烯与马来酸酐共聚物的制备及其改性研究[D].北京:中国林业科学研究院,2017.
[7]刘娜,郭鸣明.用原位核磁研究苯乙烯与马来酸酐的RAFT共聚合[J].合成树脂及塑料,2018,35(1):1-5.
[8]肖永聪,王文强,张爱民.尼龙弹性体/苯乙烯-马来酸酐接枝共聚物对尼龙6结构及性能影响[J].塑料工业,2018,46(4):51-54.
[9]周家达,房宽峻,张霞.苯乙烯马来酸酐共聚物的阳离子化改性及其应用[J].中华纸业,2007,28(2):47-50.
[10]徐健,余红敏.苯乙烯马来酸酐共聚物化学改性研究进展[J].化学研究,2010,21(5):97-102.
[11]郑国建,张松平,张羽飞.静电纺丝制备苯乙烯马来酸酐共聚物纳米纤维及其固定化β-D-半乳糖苷酶[J].过程工程学报,2010,10(4):743-749.
[12]REHAB A.Negative photoresist materials based on poly(norbornene derivatives-co-styrene-co-maleic anhydride)[J].Journal of Macromolecular Science:Part A-Pure and Applied Chemistry,2005,42(3):327-339.
[13]WANG M T,ZHU X G,WANG S X,et al.Surface pattern in thin poly(styrene-maleic anhydride)films[J].Polymer,1999,40(26):7387-7396.
[14]RONG Y,CHEN H Z,WEI D C,et al.Microcapsules with compact membrane structure from gelatin and styrene-maleic anhydride copolymer by complex coacervation[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2004,242(1/2/3):17-20.
[15]TANG C Y,YE S H,LIU H Q.Electrospinning of poly(styrene-co-maleic anhydride)(SMA)and waterswelling behavior of crosslinked/hydrolyzed SMAhydrogel nanofibers[J].Polymer,2007,48(15):4482-4491.
[16]MOGHADAM P N,AZARYAN E,ZEYNIZADE B.Investigation of poly(styrene-alt-maleic anhydride)copolymer for controlled drug delivery of ceftriaxone antibiotic[J].Journal of Macromolecular Science,Part A:Pure and Applied Chemistry,2010,47(8):839-848.
[17]王世君.苯乙烯马来酸酐交替共聚物复合微球的制备及性能研究[D].合肥:安徽大学,2014.