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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of Ethylene Terephthalate and Ethylene Naphthalate (PET-PEN) Block-co-Polyesters with Defined Surface Qualities by Tailoring Segment Composition
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Synthesis of Ethylene Terephthalate and Ethylene Naphthalate (PET-PEN) Block-co-Polyesters with Defined Surface Qualities by Tailoring Segment Composition

机译：通过定制链段组成合成表面质量确定的对苯二甲酸乙二酯和萘二甲酸乙二酯（PET-PEN）嵌段共聚酯

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摘要

Ethylene terephthalate and ethylene naphthalate oligomers of defined degree of polymerization were synthesized via chemical recycling of the parent polymers. The oligomers were used as defined building blocks for the preparation of novel block-co-polyesters having tailored sequence compositions. The sequence lengths were systematically varied using Design of Experiments. The dispersive surface energy and the specific desorption energy of the co-polymers were determined by inverse gas chromatography. The study shows that polyethylene terephthalate-polyethylene naphthalate (PET-PEN) block-co-polyesters of defined sequence lengths can be prepared. Furthermore, the specific and dispersive surface energies of the obtained block-co-polyesters showed a linear dependence on the oligomer molecular weight and it was possible to regulate and control their interfacial properties. In contrast, with the corresponding random-block-co-polyesters no such dependence was found. The synthesized block-co-polyesters could be used as polymeric modifying agents for stabilizing PET-PEN polymer blends.
机译：通过母体聚合物的化学循环合成了确定聚合度的对苯二甲酸乙二酯和萘二甲酸乙二酯。该低聚物用作定义的结构单元，用于制备具有定制序列组成的新型嵌段-共聚酯。使用实验设计系统地改变了序列长度。通过反相气相色谱法测定共聚物的分散表面能和比解吸能。研究表明，可以制备具有规定序列长度的聚对苯二甲酸乙二醇酯-聚萘二甲酸乙二醇酯（PET-PEN）嵌段-共聚酯。此外，所获得的嵌段共聚酯的比表面能和分散表面能显示出对低聚物分子量的线性依赖性，并且可以调节和控制它们的界面性质。相反，对于相应的无规嵌段共聚酯，没有发现这种依赖性。合成的嵌段共聚酯可以用作稳定PET-PEN聚合物共混物的聚合物改性剂。

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