摘要
以马来酸酐(MAH)和丙烯酸丁酯(BA)为单体,通过溶液接枝法制备了聚乳酸(PLA)接枝MAH/BA共聚物(m PLA)。使用红外光谱(FT-IR)、广角X射线衍射(WAXD)、差示扫描量热仪(DSC)、热重分析仪(TG)研究了接枝共聚物的结构和性能。结果表明,随着单体质量比BA/MAH的增加,单体在PLA上的接枝率出现先增大后减小的趋势,当m(MAH)/m(BA)=1/1,m(MAH)/m(PLA)=3/100时,制备的m PLA接枝率最高为1.96%;与纯PLA相比,m PLA的结晶度和热稳定性均比有所下降,且样品的接枝率越大其结晶度越低;随着单体中BA含量的增加,m PLA的熔融温度和玻璃化转变温度有减小的趋势。
Maleic anhydride( MAH) / butyl acrylate( BA) grafted poly( lactic acid)( PLA) copolymers( m PLAs) were prepared through solution grafting copolymerization using benzoyl peroxide as initiator,MAH and BA as monomers. The structure and properties of the graft copolymers were characterized by Fourier transform infrared spectroscopy( FT-IR),wide-angle X-ray diffraction( WAXD),differential scanning calorimetry( DSC) and thermogravimetry( TG). The monomer graft degree on PLA first increases and then decreases with increasing mass ratio of BA to MAH. It reaches the highest value of 1. 96% when the mass ratios of BA to MAH and MAH to PLA are 1 /1 and 3 /100 respectively. Compared with the pure PLA,m PLAs exhibit lower crystallinity and decreased thermal stability. A higher monomer graft degree was associated with a lower crystallinity of the samples. With the increase of mass ratio of BA to MAH,both the melting temperature and glass transition temperature of m PLAs have a trend of declining.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第12期12025-12028,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(31370569)
湖南省教育厅重点资助项目(13A121)
关键词
聚乳酸
接枝
马来酸酐
丙烯酸丁酯
共聚物
poly(lactic acid)
graft
maleic anhydride
butyl acrylate
copolymer