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首页> 外文期刊>繊維学会誌 >Reactive Electrospinning of Stereoblock Polylactides Prepared via Spontaneous Diels-Alder Coupling of Bis Maleimide-terminated Poly-L-lactide and Bis Furan-terminated Poly-D-lactide
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Reactive Electrospinning of Stereoblock Polylactides Prepared via Spontaneous Diels-Alder Coupling of Bis Maleimide-terminated Poly-L-lactide and Bis Furan-terminated Poly-D-lactide

机译：通过双马来酰亚胺封端的聚-L-丙交酯和双呋喃封端的聚-D-丙交酯的自发Diels-Alder偶联制备的立体嵌段聚丙交酯的反应性静电纺丝

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摘要

Bis maleimide-terminated poly-L-lactide (M-PLLA-M) and bis furan-terminated poly-D-lactide (F-PDLA-F) were synthesized by isocyanate coupling reactions of mono maleimide-terminated PLLA (M-PLLA) and mono furan-terminated PDLA (F-PDLA) that had been prepared by the ordinary ring opening polymerization of L- and D-lactides with N-(2-hydroxyethyl)-maleimide and furfurylamine as the initiators, respectively. Both the M-PLLA-M and F-PDLA-F were dissolved in CH_2C1_2 in 1 : 1 ratio and subjected to the ordinary electrospinning where the initial polymer concentration was increased up to 20 wt% because of the prepolymer state of the solute and the fiber diameter could be retained in nanometer to submicron size. The molecular weight of the polymers was found to have increased from 1.0 × 10~4 to 2.5 and 4.5 × 10~4 after the electrospinning and post annealing, respectively, due to the spontaneous chain extension taking place by the terminal Diels-Alder reaction of M-PLLA-M and F-PDLA-F to form a stereoblock polylactide. The as-spun fibers were amorphous or partially semi-crystalline, whereas the annealed fibers become fully crystalline due to the formation of the stereocomplex showing a melting temperature above 200 ℃.
机译：通过单马来酰亚胺封端的PLLA（M-PLLA）的异氰酸酯偶联反应合成了双马来酰亚胺封端的聚L-丙交酯（M-PLLA-M）和双呋喃封端的聚D-丙交酯（F-PDLA-F）。分别是通过N-（2-羟乙基）-马来酰亚胺和糠胺为引发剂的L-和D-丙交酯的常规开环聚合反应制备的单呋喃末端的PDLA（F-PDLA）。将M-PLLA-M和F-PDLA-F均以1：1的比例溶解在CH_2C1_2中，并进行常规电纺丝，由于溶质和聚合物的预聚物状态，初始聚合物浓度增加至20 wt％。纤维直径可以保持在纳米至亚微米尺寸。发现聚合物的分子量在电纺丝后和退火后分别从1.0×10〜4增加到2.5和4.5×10〜4，这是由于末端的Diels-Alder反应引起的自发扩链。 M-PLLA-M和F-PDLA-F形成立体嵌段聚丙交酯。初纺纤维是非晶态或部分半结晶的，而退火后的纤维由于形成了立体复合物而变成了完全结晶，显示出高于200℃的熔融温度。

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    《繊維学会誌》 |2012年第3期|p.64-72|共9页
  • 作者

    Kazunari Masutani; Chan Woo Lee; Ryosuke Kanki; Hideki Yamane; Yoshiharu Kimura;

  • 作者单位

    Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;

    Department of Innovative Industrial and Technology, Hoseo University, Baebang-myun, Asan, Chungnam 336-795, Korea;

    Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;

    Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;

    Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;

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