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Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst
Yan, Chenghu; Zhang, Jinming; Lv, Yuxia; Yu, Jian; Wu, Jin; Zhang, Jun; He, Jiasong
2009-08-01
Source PublicationBIOMACROMOLECULES
ISSN1525-7797
Volume10Issue:8Pages:2013-2018
AbstractAn effective method for grafting L-lactide (LA) from unmodified cellulose by ring-opening polymerization (ROP) in homogeneous mild conditions is presented. By Using 4-dimethylaminopyridine (DMAP) as ail organic catalyst, cellulose-graft-poly(L-lactide) (cellulose-g-PLLA) copolymers with a molar substitution (MS(PLLA)) Of PLLA in a range of 0.99-12.28 were successfully synthesized in ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) at 80 degrees C. The amount and length of grafted PLLA in cellulose-g-PLLA copolymers were controlled by adjusting the molar ratios of LA monomer to cellulose. The structure and thermal properties of cellulose-g-PLLA copolymers were characterized by [(1)H] NMR, (13)C NMR, wide-angle X-ray powder diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and optical microscopy. The DSC results revealed that the copolymers exhibited a single glass transition temperature. T(g), which sharply decreased with the increase of MS(PLLA) up to MS(PLLA) = 8.28 (DS(PLLA) = 2.19) and increased a little with a further increase of the lactyl content. When MS(PLLA) was above 4.40, the graft copolymers exhibited thermoplastic behavior, indicating the intermolecular and intramolecular hydrogen bonds in cellulose molecules had been effectively destroyed. By using a conventional thermal processing method, fibers and disks of cellulose-g-PLLA copolymers were prepared.
DOI10.1021/bm900447u
Indexed BySCI
Language英语
WOS IDWOS:000268661400001
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:99[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67280
Collection中国科学院化学研究所
Corresponding AuthorWu, Jin
AffiliationChinese Acad Sci, Joint Lab Polymer Sci & Mat, KLEP, BNLMS, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yan, Chenghu,Zhang, Jinming,Lv, Yuxia,et al. Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst[J]. BIOMACROMOLECULES,2009,10(8):2013-2018.
APA Yan, Chenghu.,Zhang, Jinming.,Lv, Yuxia.,Yu, Jian.,Wu, Jin.,...&He, Jiasong.(2009).Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst.BIOMACROMOLECULES,10(8),2013-2018.
MLA Yan, Chenghu,et al."Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst".BIOMACROMOLECULES 10.8(2009):2013-2018.
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