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ABSTRACT
Novel peroxide-initiating monomer with the peroxide group and the polymerizable vinyl double bond was designed and prepared through cheap industrial chemical reactants and facile synthesis. Here, one kind of the peroxide-initiating monomer 2-(tert-butylperoxy)ethyl methacrylate (BPEMA) prepared through three-step simple chemical reactions, using tert-butyl hydroperoxide and 2-bromoethanol as the raw ingredients, which reacted at low temperature and obtained the 2-tert-butyl peroxy ethanol, then esterified with methacryloyl chloride or isobutyryl chloride to obtain the peroxide-initiating monomer 2-(tert-butylperoxy)ethyl methacrylate(BPEMA). The analogue peroxide-initiating compound 2-(tert-butylperoxy)ethyl isobutyrate (BPEIB) was designed and obtained using the same reactions as those employed with BPEMA. The other kind of the peroxide-initiating monomer 2-hydroperoxide ethyl methacrylate (HPEMA). The purity of the three products was determined to be above 95%. Here, develop convenient and effective methods in using peroxide-initiating monomer for the in-depth study on the preparation of branched polymers.
Acknowledgments
The National Natural Science Foundation of China (22271025, 21504009), the Natural Science Foundation of Jiangsu Higher Education Institutions of China (15KJB150002), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Program of Innovative Research Team of Changzhou University (ZMF19020310), 2020 Jiangsu Province Scientific Research and Practice Innovation Program Project (No. KYCX20_2530) and the Youth Foundation of Jiang Province (BK20190932) supported this work and all the above support is gratefully acknowledged.
Disclosure statement
No potential conflict of interest was reported by the authors.
Statement of novelty
The key novelty of this study lies in two peroxy initiator monomers and one model compound. The synthesis methods adopted are esterification and sulphonation. The synthesis conditions are mild and the post-treatment is simple, and the product with high yield and purity can be obtained. The two peroxic initiator monomers are both oxidability and polymerizability. Their oxidability is due to the peroxy bond structure, and their polymerizability is due to the double bond structure. The model compound is similar in the counterpart with oxidability owing to peroxy bond structure, except that there is no double bond structure. Compared to traditional initiators, peroxide initiator monomers can initiate the polymerisation by redox at room temperature in emulsion polymerisation. At the same time, the double bond structure gives them the ability to be branched points. The model compound can be used to synthesise linear reference to study the branched properties of polymers. All these provide a new idea for the synthesis and research of branched vinyl polymer in aqueous situation.