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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of poly(N-isopropylacrylamide) by distillation precipitation polymerization and quantitative grafting on mesoporous silica
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Synthesis of poly(N-isopropylacrylamide) by distillation precipitation polymerization and quantitative grafting on mesoporous silica

机译：蒸馏沉淀聚合和介孔二氧化硅定量接枝合成聚（N-异丙基丙烯酰胺）

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摘要

In this work, syntheses of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights were carried out in ethanol by distillation precipitation polymerization (DPP) technique. The synthesized polymers were fully characterized by attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy, nuclear magnetic resonance spectroscopy, and size exclusion chromatography techniques. The lower critical solution temperatures of the polymers were determined with differential scanning calorimetry. A simple and versatile method for the in situ synthesis and grafting of PNIPAM on mesoporus silica nanoparticles (MSNs) with improved control over quantitative grafting is devised. The PNIPAM grafted MSNs were characterized with ATR-FTIR, thermogravimetric analysis, transmission electron microscopy, and dynamic light scattering analyses. From the results obtained it is showed that quantitative grafting of PNIPAM on MSNs from 1 to 20% by weight can be tuned by manipulating the in situ DPP reaction conditions. (C) 2016 Wiley Periodicals, Inc.
机译：在这项工作中，通过蒸馏沉淀聚合（DPP）技术在乙醇中合成了不同分子量的热响应性聚（N-异丙基丙烯酰胺）（PNIPAM）。合成的聚合物通过衰减全反射傅立叶变换红外（ATR-FTIR）光谱，核磁共振光谱和尺寸排阻色谱技术进行了全面表征。用差示扫描量热法测定聚合物的较低的临界溶液温度。设计了一种简单通用的方法，用于PNIPAM在介孔二氧化硅纳米颗粒（MSN）上原位合成和接枝，并改善了对定量接枝的控制。通过ATR-FTIR，热重分析，透射电子显微镜和动态光散射分析对PNIPAM接枝的MSN进行了表征。从获得的结果表明，可以通过操纵原位DPP反应条件来调节PNIPAM在MSNs上从1到20重量％的定量接枝。 （C）2016威利期刊公司

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