聚乳酸多元醇的制备研究
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摘要
聚乳酸多元醇是合成可降解聚氨酯材料的关键软段原料.分别以1,6-己二醇与三羟甲基丙烷为链转移剂,在Sn(Oct)2的作用下使L-丙交酯开环共聚,成功制备出3种聚乳酸多元醇低聚物.通过1H NMR、FT-IR及GPC表征,表明:聚合物的结构与预期设计的吻合;相对分子质量分别为1 202、1 065、1 613; PDI分别为:1. 17、1. 12、1. 17,相对分子质量分布较窄.
Polylactic acid polyol is the key soft segment of the raw material for the synthesis of degradable polyurethane materials. In this paper,with reference to the principle of PCL polyol synthesis,1,6-hexanediol and trimethylolpropane are used as chain transfer agents,and under the action of Sn( Oct)2,L-lactide is ring-opening copolymerization for the production of three polylactic acid polyol oligomers. The polymer is characterized by1 H-NMR,FT-IR and GPC. The results show that the structure of the polymer is consistent with the expected design;the molecular weights are 1 202,1 065 and 1 613,respectively; the PDI is 1. 17,1. 12 and 1. 17,respectively,and the molecular weight distribution is narrow.
Polylactic acid polyol is the key soft segment of the raw material for the synthesis of degradable polyurethane materials. In this paper,with reference to the principle of PCL polyol synthesis,1,6-hexanediol and trimethylolpropane are used as chain transfer agents,and under the action of Sn( Oct)2,L-lactide is ring-opening copolymerization for the production of three polylactic acid polyol oligomers. The polymer is characterized by1 H-NMR,FT-IR and GPC. The results show that the structure of the polymer is consistent with the expected design;the molecular weights are 1 202,1 065 and 1 613,respectively; the PDI is 1. 17,1. 12 and 1. 17,respectively,and the molecular weight distribution is narrow.
引文
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[13] KORHONEN H,HELMINEN A,SEPPLJ V. Synthesis of polylactides in the presence of co-initiators with different numbers of hydroxyl groups[J]. Polymer,2001,42(18):7541-7549.
[2]周海鸥,史铁钧,王华林,等.聚乳酸改性的研究进展和方向[J].化工科技市场,2004,27(1):13-17.
[3] MADHAVAN NAMPOOTHIRI K,NAIR N R,JOHN R P. An overview of the recent developments in polylactide(PLA)research.[J]. Bioresource Technology,2010,101(22):8493-8501.
[4] RASAL R M,JANORKAR A V,HIRT D E. Poly(lactic acid)modifications[J]. Progress in Polymer Science,2010,35(3):338-356.
[5]田怡,钱欣.聚乳酸的结构、性能与展望[J].石化技术与应用,2006,24(3):233-237.
[6]石淑先.聚乳酸及其亲水性共聚物的制备和降解性能研究[D].北京:北京化工大学,2007.
[7] KUBIES D,RYPCEK F,KOVROVJ,et al. Microdomain structure in polylactide-block-poly(ethylene oxide)copolymer films.[J]. Biomaterials,2000,21(5):529.
[8]任杰,杨爽.生物医用材料——聚乳酸的表面改性研究进展[J].北京生物医学工程,2004,23(4):299-302.
[9] BERTOLOTTI C,DEPLANO V. Three-dimensional numerical simulations of flow through a stenosed coronary bypass[J]. Journal of Biomechanics,2000,33(8):1011-1022.
[10]石朔,顾林,杨义浒,等.低相对分子质量线型和星形聚乳酸及其共聚物多元醇的合成、结构与性能[J].高分子材料科学与工程,2016,32(4):1-6.
[11]张毅志.聚乳酸及其共聚物的合成与性能研究[J].轻工科技,2008,24(8):23-23.
[12] YU T,REN J,GU S,et al. Synthesis and characterization of poly(lactic acid)and aliphatic polycarbonate copolymers[J].Polymer International,2010,58(9):1058-1064.
[13] KORHONEN H,HELMINEN A,SEPPLJ V. Synthesis of polylactides in the presence of co-initiators with different numbers of hydroxyl groups[J]. Polymer,2001,42(18):7541-7549.