Water-Induced Formation of Reverse Micelles from Diblock Copolymer of Styrene and N-Isopropylacrylamide in 1,2-Dichloroethane
Water-Induced Formation of Reverse Micelles from Diblock Copolymer of Styrene and N-Isopropylacrylamide in 1,2-Dichloroethane
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DOI：
10.1021/acs.macromol.5b00480
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发表时间：
2015-06
期刊：
影响因子：
5.5
通讯作者：
Tomoe Arai;A. Hashidzume;Takahiro Sato
中科院分区：
文献类型：
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作者：
Tomoe Arai;A. Hashidzume;Takahiro Sato
主要通过光散射研究水诱导聚苯乙烯-b-聚（N-异丙基丙烯酰胺）（PS(x)-PN(y)，其中x和y分别是PS和PN嵌段的聚合度）在1,2-二氯乙烷（DCE）中形成反胶束。通过可逆加成-断裂链转移（RAFT）自由基聚合技术制备了四种具有不同聚合度x和y的PS（x）-PN（y）样品。虽然 PS(x)–PN(y) 以分子形式分散在 DCE 中，但水的添加显着增强了所有 PS(x)–PN(y) 样品的 DCE 溶液的散射光强度，表明形成了以水池作为胶束核心的反胶束。使用球形反胶束模型分析 PS(x)–PN(y)/水/DCE 三元体系的静态光散射 (SLS) 数据来估计结构参数，这些参数取决于亲水-疏水平衡，即 y/x。
Water-induced formation of reverse micelles from polystyrene-b-poly(N-isopropylacrylamide) (PS(x)–PN(y), where x and y were the degrees of polymerization of PS and PN blocks, respectively) in 1,2-dichloroethane (DCE) was investigated mainly by light scattering. Four PS(x)–PN(y) samples with different degrees of polymerization x and y were prepared by the reversible addition–fragmentation chain-transfer (RAFT) radical polymerization technique. While PS(x)–PN(y) was molecularly dispersed in DCE, the addition of water remarkably enhanced scattering light intensity from the DCE solutions of all the PS(x)–PN(y) samples, indicative of the formation of the reverse micelle having a water pool as the micellar core. Static light scattering (SLS) data for PS(x)–PN(y)/water/DCE ternary systems were analyzed using a model of spherical reverse micelle to estimate structural parameters, which were dependent on the hydrophilic–hydrophobic balance, i.e., y/x.