含硅三嵌段低聚物对聚对苯二甲酸乙二酯的强成核作用

Strong Nucleating Effect of Si-Containing Tri-Block Oligomers on Poly(Ethylene Terephthalate).

作者信息

Sun Quankai, Wang Yao, Zhang Miaorong, Huang Linjun, Zhang Pengwei, Li Kang, Wang Wei, Tang Jianguo

机构信息

Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.

出版信息

Molecules. 2025 Jul 23;30(15):3077. doi: 10.3390/molecules30153077.

DOI:10.3390/molecules30153077

PMID:40807252

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12348685/

Abstract

The development of a silane coupling agent with an aminopropyl structure as a nucleating agent for poly(ethylene terephthalate) (PET) is reported in this study. The tri-block oligomers nucleating agent was formed by 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane/oxalic acid/low molecular weight PET (LPOBD). It was subsequently cross-linked with tetraethyl orthosilicate to form LPOBD-T. Composites of LPOBD/PET and LPOBD-T/PET were prepared by melt blending, and their thermal and crystallization behaviors were analyzed using XRD, DSC, TG, and POM. The results indicated that not only did the triblock polymer nucleating agent LPOBD exhibit a strong nucleation effect, but the crosslinked LPOBD-T also demonstrated superior crystallization performance. Specifically, the crystallinity of the 1 wt% LPOBD-T/PET composite increased by 3.3%, the crystallization temperature rose by 21.1 °C, and the t was reduced by 53 s. Moreover, the crystalline morphology was more uniform. These findings indicate that the tri-block oligomers synthesized from a silane coupling agent serve as effective nucleating agents for PET.

摘要

本研究报道了一种具有氨丙基结构的硅烷偶联剂作为聚对苯二甲酸乙二酯（PET）成核剂的开发情况。三嵌段低聚物成核剂由1,3-双（3-氨丙基）-1,1,3,3-四甲基二硅氧烷/草酸/低分子量PET（LPOBD）形成。随后它与正硅酸乙酯交联形成LPOBD-T。通过熔融共混制备了LPOBD/PET和LPOBD-T/PET复合材料，并使用XRD、DSC、TG和POM对它们的热行为和结晶行为进行了分析。结果表明，三嵌段聚合物成核剂LPOBD不仅表现出强烈的成核效果，而且交联后的LPOBD-T也表现出优异的结晶性能。具体而言，1 wt% LPOBD-T/PET复合材料的结晶度提高了3.3%，结晶温度升高了21.1℃，t缩短了53 s。此外，结晶形态更加均匀。这些发现表明，由硅烷偶联剂合成的三嵌段低聚物可作为PET的有效成核剂。