On July 18, 2018, Li, Mei; Zhang, Rongchun; Li, Xiaohui; Wu, Qiang; Chen, Tiehong; Sun, Pingchuan published an article.Recommanded Product: 517-23-7 The title of the article was High-performance recyclable cross-linked polyurethane with orthogonal dynamic bonds: The molecular design, microstructures, and macroscopic properties. And the article contained the following:
Polyurethane materials (PUs) have been widely used in industry and daily life due to the versatile chem. However, despite the rapid advance in synthetic chem., it still remains a significant challenge for the facile fabrication of PUs with a single crosslinked network embedded with excellent mech. properties and recyclability. Herein, in this study, we proposed a simple strategy to fabricate a high-performance recyclable crosslinked PU and revealed the relationship between microscopic structure and macroscopic properties. The UPy (2-ureido-4-[1H]-pyrimidione) motifs were incorporated into the backbone chains of PUs, where the quadruple hydrogen bonding interactions between UPy dimers can significantly enhance the mech. strength and toughness. Furthermore, a single small mol. Diels-Alder adduct was utilized as the chem. crosslinker, rendering the final crosslinked PUs healable and recyclable. The thermal reversibility of the Diels-Alder reaction was well verified by DSC and solid-state NMR spectroscopy. Notably, it was found that the incorporation of UPy motifs could enhance the strain-induced crystallization (SIC), leading to a large stress at break. The structural and dynamic changes induced by SIC were quant. addressed by proton multiple-quantum NMR spectroscopy and SAXS experiments, where SIC further imposed restrictions on the mobility of surrounding polymer chains in the soft domain and led to the change of microphase separated nanostructures. Overall, a simple strategy is proposed here for the facile fabrication of high performance recyclable PUs, and the detailed investigation here on the structure-property relationship may further provide insights into developing high performance polymeric materials. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7
The Article related to recyclable polyurethane orthogonal dynamic bond design microstructure, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.Recommanded Product: 517-23-7
Referemce:
Ester – Wikipedia,
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