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具有三重形状记忆效应的半结晶聚烯烃共混物的共价自适应网络

Covalent Adaptable Network of Semicrystalline Polyolefin Blend with Triple-Shape Memory Effect.

作者信息

Lee Hann, Jang Yujin, Chang Young-Wook, Lim Changgyu

机构信息

Department of Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.

BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan 15588, Republic of Korea.

出版信息

Polymers (Basel). 2024 Sep 25;16(19):2714. doi: 10.3390/polym16192714.

DOI:10.3390/polym16192714
PMID:39408425
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11479110/
Abstract

A covalent adaptable network (CAN) of semicrystalline polyolefin blends with triple-shape memory effects was fabricated by the reactive melt blending of maleated polypropylene (mPP) and maleated polyolefin elastomer (mPOE) (50 wt/50 wt) in the presence of a small amount of a tetrafunctional thiol (PETMP) and 1,5,7-triazabicyclo [4,4,0]dec-5-ene (TBD). The polymer blend formed a chemically crosslinked network via the reaction between the thiol group of PETMP and maleic anhydride of both polymers in the blend, which was confirmed by FTIR, the variation of torque during the melt mixing process, a solubility test, and DMA. DSC analysis revealed that the crosslinked polyolefin blends show two distinct crystalline melting transitions corresponding to each component polymer. Improved tensile strength as well as elongation at break were observed in the crosslinked blend as compared to the simple blend, and the mechanical properties were maintained after repeated melt processing. These results suggest that thermoplastic polyolefin blends can be transformed into a high-performance and value-added material with good recyclability and reprocessability.

摘要

通过在少量四官能硫醇（PETMP）和1,5,7-三氮杂双环[4,4,0]癸-5-烯（TBD）存在下，将马来酸酐化聚丙烯（mPP）和马来酸酐化聚烯烃弹性体（mPOE）（50 wt/50 wt）进行反应性熔融共混，制备了具有三重形状记忆效应的半结晶聚烯烃共混物的共价自适应网络（CAN）。聚合物共混物通过PETMP的硫醇基团与共混物中两种聚合物的马来酸酐之间的反应形成化学交联网络，这通过FTIR、熔融混合过程中的扭矩变化、溶解度测试和DMA得到证实。DSC分析表明，交联聚烯烃共混物显示出对应于每种组分聚合物的两个不同的结晶熔融转变。与简单共混物相比，交联共混物的拉伸强度和断裂伸长率均有所提高，并且在重复熔融加工后机械性能得以保持。这些结果表明，热塑性聚烯烃共混物可以转变为具有良好可回收性和再加工性的高性能和高附加值材料

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/ac22c7a3ea77/polymers-16-02714-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/b99076457f88/polymers-16-02714-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/8f8cac42ac78/polymers-16-02714-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/3258f736714d/polymers-16-02714-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/892ce00ef3c2/polymers-16-02714-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/58431bd45743/polymers-16-02714-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/294a360917a7/polymers-16-02714-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/66b552ebea67/polymers-16-02714-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/17240995baba/polymers-16-02714-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/ac22c7a3ea77/polymers-16-02714-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/b99076457f88/polymers-16-02714-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/8f8cac42ac78/polymers-16-02714-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/3258f736714d/polymers-16-02714-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/892ce00ef3c2/polymers-16-02714-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/58431bd45743/polymers-16-02714-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/294a360917a7/polymers-16-02714-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/66b552ebea67/polymers-16-02714-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/17240995baba/polymers-16-02714-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a63/11479110/ac22c7a3ea77/polymers-16-02714-g009.jpg

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