The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid

GAO Qinwei1, HE Gang2, LI Mingzi1, XU Baisen3

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2009, Vol. 33 ›› Issue (03) : 111-115.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2009, Vol. 33 ›› Issue (03) : 111-115. DOI: 10.3969/j.jssn.1000-2006.2009.03.026

The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid

  • GAO Qinwei1, HE Gang2, LI Mingzi1, XU Baisen3
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Abstract

Polys (lactic acid) was prepared from D,Llactic acid through melt polycondesation. Viscometry, polarimetry, 1HNMR, 13CNMR and XRD were performed to detect poly(lactic acid) (PLA) samples. PLA with excessive Lonformation units in polymer chains can be obtained using SnCl2 and naphthalene disulphonic acid (NDA) as catalyst system. Ratios of SnCl2 and NDA and its contents affected the opitical purities of PLAs, PLA microstructures of chains and cryticals. When SnCl2 content was 0.5% and n(SnCl2)/n(NDA) 1∶1, PLA with opitical purity 97.4% was then obtained from D,Llactic acid.

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GAO Qinwei1, HE Gang2, LI Mingzi1, XU Baisen3. The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2009, 33(03): 111-115 https://doi.org/10.3969/j.jssn.1000-2006.2009.03.026

References

[1]Robert J L, Aubrecht K B. Green chemistry: Ringopening polymerization of lactide to form a biodegradable polymer[J]. J Chem Edu, 2008, 85(2): 258-260.
[2]Platel R H, Hodgson L M, Williams C K. Biocompatible initiators for lactide polymerization[J]. Polym Rev, 2008, 48(1): 11-63.
[3]Tang Z H, Yang Y K, Pang X, et al. Controlled and stereospecific polymerization of raclactide with a singlesite ethyl aluminum and alcohol initiating system[J]. J Appl Polym Sci, 2005, 98(1): 102-108.
[4]高勤卫,李明子,董晓. 聚乳酸的立构选择性聚合的研究进展[J]. 现代化工,2007,27(10):20-24.
[5]高勤卫,李明子,董晓. D,L乳酸的立构选择性聚合[J]. 南京林业大学学报:自然科学版,2008,32(3):43-47.
[6]董晓. 聚乳酸的立构选择性聚合研究[D]. 南京:南京林业大学,2007.
[7]Gao QW, Lan P, Shao H, et al. Direct synthesis with melt polycondensation and microstructure analysis of poly (Llactic acidcoglycolic acid)[J]. Polym J, 2002, 35(11): 786-790.
[8]Spassky N, Wisniewski M, Pluta C, et al. Highly stereoelective polymerization of rac(D,L)lactide with a chiral Schiff’s base /aluminium alkoxide initiator[J]. Macromol Chem Phys, 1996, 197: 2627-2637.
[9]Akihiro Ando, Kunio Kimura, Yuko Onda, et al. New attempt at the stereoselective polymerization of lactide by using crystallization during polymerizaion[J]. Macromolecular Rapid Communications, 2005, 26: 98-102.
[10]Choi E J, Park J K, Chang H N. Effect of polymerization catalysts on the microstructure of poly (LLAcoεCL)[J]. J Polym Sci Part B: Polym Phys, 1994, 32: 2481-2489.
[11]Esoartero J L, Manolova S M, Manolova N, et al. NMR analysis of low molecular weight poly(lactic acid)s[J]. Macromoleculars, 1996, 29: 3535-3539.
[12]Svhindler A, Harper D J. Poly(lactic acid) I stereosequence distribution in the polymerization of racemic dilactide[J]. Polym Sci: Polym Lett, 1976, 14: 729-734.
[13]Chamberlain B M, Cheng M, Moore D R, et al. Polymerization of lactide with zinc and magnesium betadiiminate complexes: stereocontrol and mechanism[J]. J Am Chem Soc, 2001, 123(14): 3229-3238.
[14]Coates Geoffrey W, Ovitt Tina M. Stereoselective ringopening polymerization of lactide: Synthesis of syndiotactic and heterotactic poly(lactic acid)s[C]//Book of Abstracts, 219th ACS National Meeting, San Francisco, CA, 2000.
[15]Kricheldorf H R, and Sumbel M. Polylactones18 polymerization of L,Llactide with Sn(Ⅱ) and Sn(Ⅳ) halogenides[J]. Eur Polym, 1989, 25: 585-591.
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