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首页> 外文期刊>Journal of Applied Polymer Science >Solid State Mechano-Chemical Grafting Copolymerization of Hydroxyethyl Cellulose with Acrylic Acid
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Solid State Mechano-Chemical Grafting Copolymerization of Hydroxyethyl Cellulose with Acrylic Acid

机译：羟乙基纤维素与丙烯酸的固态机械化学接枝共聚

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摘要

The effects of mechanochemical treatment on hydroxyethyl cellulose (HEC) and its grafting reaction with acrylic acid (AA) under solvent-free conditions were studied through a vibratory ball-milling machine, which was developed in our laboratory. Fourier transform infrared (FTIR) spectroscopy and 13C-NMR analysis were used to investigate the structural development of HEC during vibromilling and the grafting mechanism. Further development of the structure and properties of the graft copolymer was characterized by viscosity measurement, wide-angle X-ray diffraction (WAXD), and thermal gravity (TG) analysis. The FTIR results showed a new peak at 1720 cm 1, corresponding to the C_O absorbance peak of AA, which indicated that AA was successfully grafted onto HEC during the high-energy vibromilling of the HEC/AA mixture at ambient temperature in the absence of a solvent and a catalyst. The WAXD showed the destruction of crystals of HEC during the milling, and the TG analysis demonstrated the improvement of the thermal stability of the copolymer. The effects of the processing conditions on the grafting rate and grafting efficiency were studied by chemical titration to determine the optimum grafting conditions.
机译：通过实验室研制的振动球磨机研究了机械化学处理对羟乙基纤维素（HEC）及其在无溶剂条件下与丙烯酸（AA）的接枝反应的影响。傅里叶变换红外光谱（FTIR）和13C-NMR分析被用来研究HEC在振动研磨过程中的结构发展和接枝机理。接枝共聚物的结构和性能的进一步发展通过粘度测量，广角X射线衍射（WAXD）和热重（TG）分析来表征。 FTIR结果显示在1720 cm 1处出现一个新峰，对应于AA的C_O吸收峰，这表明在环境温度不存在的情况下，在环境温度下HEC / AA混合物的高能振动过程中，AA成功地接枝到了HEC上。溶剂和催化剂。 WAXD显示在研磨过程中HEC的晶体破坏，TG分析表明共聚物的热稳定性得到改善。通过化学滴定法研究了工艺条件对接枝率和接枝效率的影响，确定了最佳接枝条件。

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