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首页> 外文期刊>Journal of Applied Polymer Science >Poly(alkyl lactate acrylate)s Having Tunable Hydrophilicity
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Poly(alkyl lactate acrylate)s Having Tunable Hydrophilicity

机译：具有可调亲水性的聚乳酸烷基丙烯酸酯

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Four alkyl lactates and alkyl lactate acrylates having methyl, ethyl, propyl, and butyl as alkyl moiety were synthesized by azeotropic distillation. Their formation was confirmed by Fourier transform infrared (FTIR), mass, ~1H nuclear magnetic resonance (NMR) and proton decoupled ~(13)C NMR spectroscopic techniques. Solution polymerization was carried out for these alkyl lactate acrylates and the formed homopolymers were characterized by FTIR, ~1H NMR, proton decoupled ~(13)C NMR spectroscopic, and gel permeation chromatographic techniques. Shear thinning behavior was observed for all the polymers. Wide angle X-ray Diffraction studies showed that the polymers were amorphous in nature and also exhibited odd-even effect among alkyl lactate groups with respect to average molecular interchain spacing. Depending on the length of the alkyl lactate groups, relative humidity and time, the hydrophilicity of the polymers decreased with increase in the length of the alkyl lactate group among the odd and even series. Among the studied polymers, poly(ethyl lactate acrylate) may have the potential for hydrogel applications, due to its highly hydrophilic nature. T_g decreased with increase in length of alkyl lactate groups. Trend observed on the thermal stabilities of poly(alkyl lactate acrylate)s could be explained on the basis of average molecular interchain spacing. VC 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40962.
机译：通过共沸蒸馏合成四种具有甲基，乙基，丙基和丁基作为烷基部分的乳酸烷基酯和乳酸烷基酯丙烯酸酯。通过傅立叶变换红外（FTIR），质量，〜1H核磁共振（NMR）和质子去耦〜（13）C NMR光谱技术确认了它们的形成。对这些乳酸烷基丙烯酸酯进行溶液聚合，并通过FTIR，〜1H NMR，质子去耦〜（13）C NMR光谱和凝胶渗透色谱技术对形成的均聚物进行表征。观察到所有聚合物的剪切稀化行为。广角X射线衍射研究表明，该聚合物本质上是无定形的，并且相对于平均分子链间间距，在乳酸烷基酯之间还表现出奇偶效应。取决于乳酸烷基酯基团的长度，相对湿度和时间，在奇数和偶数系列中，聚合物的亲水性随乳酸烷基酯基团的长度的增加而降低。在所研究的聚合物中，聚乳酸丙烯酸乙酯由于其高度亲水性而具有潜在的水凝胶应用前景。 T_g随着乳酸烷基酯基团长度的增加而降低。聚乳酸烷基丙烯酸酯的热稳定性观察到的趋势可以根据平均分子链间间距来解释。 VC 2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2014，131，40962。

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