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首页> 外文学位 >Renewable resource lactide derived novel materials: Synthesis and characterization of fluorinated polylactides, epoxy terpolymers, oligoethylene-end-capped-polylactides and poly(ester amide)s.
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Renewable resource lactide derived novel materials: Synthesis and characterization of fluorinated polylactides, epoxy terpolymers, oligoethylene-end-capped-polylactides and poly(ester amide)s.

机译：可再生资源丙交酯衍生的新型材料：氟化聚丙交酯，环氧三元共聚物，低乙烯基封端的聚丙交酯和聚（酯酰胺）的合成和表征。

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This dissertation includes the synthesis of four types of copolymers derived from lactide monomer. The chemical building block of polylactide, the lactide monomer, is derived from lactic acid, which is a fermentation product of corn sugar.; Growing environmental awareness throughout the world has triggered the search for new materials and processes. The need for renewable resource materials in chemical building blocks has become more prominent for commodity thermoplastics where depletion and rising costs of petroleum resources is a consideration. This study is focused on fulfilling this need and finding methods to incorporate lactide into polymeric materials for commercial use.; The first part of this dissertation focuses on the synthesis of fluorinated polylactides. This goal was accomplished through two different routes. During the first route the synthesis of fluorinated lactide monomer was carried out using an electrophylic fluorinating agent N-flurobenzenesulfonimide (NFBS) under mild conditions to obtain the fluorinated monomer, alpha,alpha '-difluorolactide. Its ring opening polymerization was carried out in tetrahydrofuran with an n-BuLi initiator. In the second route, partial fluorination of the commercially available polylactide was accomplished through the formation of carboanion using a NaH base followed by the addition of the fluorinating reagent NFBS.; During the second part of the study, the incorporation of lactide into epoxy resins was investigated. The terpolymerization of lactide, hexafluoroisopropylidenediphenol (6F-Bis-A) and diglycidyl ether of bisphenol-A (DGEBA) was accomplished using tertiary phosphonium, ammonium catalysts and crown ether complexes.; In the third part of this study, the synthesis and the potential use of oligoethylene end capped polylactides as compatibilizers in polylactide-polyethylene blends, and nucleants were investigated. In this study commercially available linear primary alcohol oligoethylene derivatives (Unilin alcohols) were used as the macroinitiator in the ring opening polymerization of lactide to obtain the corresponding copolymers.; In the final part of this research, poly(ester amide)s based on lactide and depsipeptides were investigated. Two different depsipeptides, commercially available morpholine-2,5-dione monomer and 6,6'-dimethyl-2,5-morpholinedione synthesized in our laboratory, were used for copolymerization with L-lactide. (Abstract shortened by UMI.)
机译：本论文包括合成四种丙交酯单体的共聚物。丙交酯（丙交酯单体）的化学组成部分衍生自乳酸，它是玉米糖的发酵产物。全世界日益增长的环境意识引发了对新材料和新工艺的寻找。对于化学热塑性塑料中对可再生资源材料的需求，对于那些考虑到石油资源的枯竭和成本上涨的商品热塑性塑料而言，已经变得更加突出。这项研究的重点是满足这种需要并找到将丙交酯掺入商业用途的聚合材料中的方法。本文的第一部分着重于氟化聚丙交酯的合成。这个目标是通过两种不同的途径实现的。在第一途径中，在温和的条件下使用电离氟化剂N-氟苯磺酰亚胺（NFBS）进行氟化丙交酯单体的合成，以获得氟化单体α，α'-二氟丙交酯。它的开环聚合反应是在四氢呋喃中用n-BuLi引发剂进行的。在第二种方法中，可商购的聚丙交酯的部分氟化是通过使用NaH碱形成碳负离子，然后添加氟化试剂NFBS来完成的。在研究的第二部分中，研究了将丙交酯掺入环氧树脂的过程。丙交酯，六氟异亚丙基二酚（6F-Bis-A）和双酚A的二缩水甘油醚（DGEBA）的三元聚合反应是使用叔using，铵催化剂和冠醚络合物完成的。在这项研究的第三部分中，研究了低端封端的聚丙交酯的合成及其在聚丙交酯-聚乙烯共混物中的相容剂和成核剂的潜在用途。在这项研究中，使用市售的线性伯醇低聚乙烯衍生物（Unilin醇）作为丙交酯开环聚合反应中的大分子引发剂，以获得相应的共聚物。在本研究的最后部分，对基于丙交酯和二肽的聚（酯酰胺）进行了研究。在我们实验室中合成的两种不同的二肽，即市售的吗啉-2,5-二酮单体和6,6'-二甲基-2,5-吗啉二酮与L-丙交酯共聚。 （摘要由UMI缩短。）

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