可逆加成-断裂链转移自缩合乙烯基聚合制备多刺激响应水溶性超支化聚合物的合成及性能,ACS Applied Polymer Materials

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可逆加成-断裂链转移自缩合乙烯基聚合制备多刺激响应水溶性超支化聚合物的合成及性能
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2021-12-14 , DOI: 10.1021/acsapm.1c01608
Sahand Rahemipoor _{1,

2} , Mohammad Kohestanian _{1,

2} , Ali Pourjavadi ₁ , Hossein Heidarzadeh Vazifehkhorani ₁ , Mehdi Mehrali ₂

Affiliation

使用可逆加成-断裂链转移自缩合乙烯基聚合（RAFT-SCVP）在一步聚合中合成多刺激响应的超支化聚合物。这些超支化聚合物对 UV-vis 或阳光、pH 变化和温度变化有反应。2-(十二烷基硫代硫代羰基硫代)-2-甲基丙酸DDMAT参与与甲基丙烯酸2-羟乙酯的酯化反应得到链转移单体2-((2-(((十二烷基硫代)硫代羰基)硫代)-2-甲基丙酰基)氧基)甲基丙烯酸乙酯(MACDT)。首次采用 RAFT-SCVP 方法，使用 2-(二甲氨基) 甲基丙烯酸乙酯 (DMAEMA)、螺恶嗪丙烯酰基单体和 MACDT 以不同的进料比 ([DMAEMA]/[MACDT] ）。而且，通过 RAFT-SCVP 方法制备的智能超支化聚合物揭示了控制分子量和支化度 (DB) 的方式。此外，该研究表明，当聚合物的 DB 增加或进料比降低时，超支化聚合物的光致变色性能和下临界溶解温度点降低。此外，这些智能超支化聚合物具有用作传感器的潜力。

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Synthesis and Properties of Multi-stimuli-Responsive Water-Soluble Hyperbranched Polymers Prepared Via Reversible Addition–Fragmentation Chain Transfer Self-Condensing Vinyl Polymerization

Multistimuli-responsive hyperbranched polymers were synthesized in one-step polymerization using reversible addition–fragmentation chain transfer self-condensing vinyl polymerization (RAFT-SCVP). These hyperbranched polymers responded to UV–vis or sunlight, pH changes, and temperature changes. 2-(dodecylthiocarbonothioylthio)-2-methylpropionic acid known as DDMAT participated in esterification with 2-hydroxyethyl methacrylate to obtain a chain transfer monomer in the name of 2-((2-(((dodecylthio)carbonothioyl)thio)-2-methylpropanoyl)oxy)ethylmethacrylate (MACDT). For the first time, smart hyperbranched polymers were produced with the RAFT-SCVP method in one step by using 2-(dimethylamino)ethyl methacrylate (DMAEMA), spirooxazine acryloyl monomer, and MACDT with different feed ratios ([DMAEMA]/[MACDT]). Moreover, smart hyperbranched polymers prepared by the RAFT-SCVP method reveal the manner of controlling molecular weights and the degree of branching (DB). Additionally, this study shows that when the DB of polymers was increased or feed ratios were decreased, photochromic properties and the lower critical solution temperature point of hyperbranched polymers were reduced. Furthermore, these smart hyperbranched polymers have the potential to be utilized as sensors.

更新日期：2022-01-14

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