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Etude et modification des propriétés du poly(butylène succinate), un polyester biosourcé et biodégradable

机译:生物基可生物降解聚酯聚丁二酸丁二醇酯的性能研究和改性

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摘要

Within the frame of sustainable development, biobased and biodegradable polymers are going to play an important role according to economic and environmental perspectives. The polyolefins currently used in packaging and automotive industries will be replaced by biomaterials. The poly(butylene succinate), an “old” aliphatic polyester, has recently regained interest thanks to its biobased and biodegradable potential and mechanical properties similar to polyolefins. However, this polyester is very sensitive to degradation even at mild ambient conditions and, even though its flexibility is comparable to polyethylene or polypropylene, its modulus is too low. Some modifications of the chemical structure were considered to improve the long-term use of PBS. The synthesis of random copolymers using long-chain fatty acid Pripol 1009 or terephthalic acid allows to reduce significantly the hydrolysis rate and properties are maintained during a longer time. The incorporation of fillers like calcium carbonate and talc also enhance the PBS stability. The addition of calcium carbonate neutralizes carboxyl terminal group, which play an autocatalytic role in the hydrolytic degradation. High aspect ratio of talc increases the gas and liquid diffusion path, reducing permeability and providing better barrier properties to the material. In order to improve Young’s modulus, formulating blends with mineral fillers like calcium carbonate and talc, or with more rigid polyesters like polylactic acid or poly(butylene terephthalate) are efficient. The most interesting results are obtained by using calcium carbonate and polylactic acid, which allow the preservation of PBS’s flexibility. Processing parameters should be maximized to limit the degradation of PBS. Combinations of the most interesting solutions were investigated and lead to materials which fulfill the required specifications.
机译:在可持续发展的框架内,根据经济和环境的观点,生物基和可生物降解的聚合物将发挥重要作用。当前用于包装和汽车行业的聚烯烃将被生物材料取代。聚丁二酸丁二醇酯是一种“古老的”脂族聚酯,由于其生物基和可生物降解的潜力以及与聚烯烃相似的机械性能,最近引起了人们的关注。但是,即使在温和的环境条件下,这种聚酯对降解也非常敏感,即使其柔韧性可与聚乙烯或聚丙烯相比,其模量也太低。化学结构的某些修饰被认为可以改善PBS的长期使用。使用长链脂肪酸Pripol 1009或对苯二甲酸合成无规共聚物可显着降低水解速率,并在较长时间内保持性能。诸如碳酸钙和滑石之类的填料的掺入也增强了PBS的稳定性。碳酸钙的添加中和了羧基端基,该羧基端基在水解降解中起自催化作用。高滑石的长径比增加了气体和液体的扩散路径,降低了渗透性,并为材料提供了更好的阻隔性能。为了提高杨氏模量,与矿物填料(如碳酸钙和滑石粉)或与刚性更高的聚酯(如聚乳酸或聚对苯二甲酸丁二醇酯)配制掺合物是有效的。最有趣的结果是使用碳酸钙和聚乳酸,可以保持PBS的柔韧性。应最大化处理参数以限制PBS的降解。研究了最有趣的解决方案的组合,并得出了满足所需规格的材料。

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    Freyermouth Floriane;

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  • 年度 2014
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