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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Characterization of Polyaspartic Acid-Glutamic Acid Grafted Copolymers and Their Performances as Detergent Builder
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Synthesis and Characterization of Polyaspartic Acid-Glutamic Acid Grafted Copolymers and Their Performances as Detergent Builder

机译：聚天冬氨酸-谷氨酸接枝共聚物的合成，表征及其作为助洗剂的性能

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摘要

Polysuccinimide (PSI) was first synthesized via thermal polycondensation reaction using maleic anhydride and urea as the starting materials. Then, polyaspartic acid-glutamic acid (PASP-GLU) grafted copolymers were prepared from PSI and GLU. The structure of PASP-GLU was characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The molecular weight was measured by gel permeation chromatography, and the crystallinity was analyzed by X-ray diffraction spectra. The effects of grafting ratio on the builder performances were systematically studied, as well as on the thermal property and biodegradability. It is demonstrated that as the grafting ratio of GLU increases, the thermal stability and biodegradability decrease a little, but still maintain in high level. Most importantly, the incorporation of GLU into side chains significantly improves the builder performance of PASP-GLU. The maximum values for calcium ion chelating power, dispersion power of CaCO_3, and alkali-buffer ability reach 233.2 mg, 108.9 mg, and 1.70 mL, respectively, at the highest grafting ratio, in which the dispersion power of CaCO_3 and alkali-buffer ability are even better than that of sodium tripolyphosphate.
机译：首先通过热缩聚反应以马来酸酐和尿素为原料合成聚琥珀酰亚胺（PSI）。然后，由PSI和GLU制备了聚天冬氨酸-谷氨酸（PASP-GLU）接枝的共聚物。通过傅里叶变换红外光谱和核磁共振光谱对PASP-GLU的结构进行了表征。通过凝胶渗透色谱法测量分子量，并通过X射线衍射光谱分析结晶度。系统地研究了接枝率对助洗剂性能的影响，以及对热性能和生物降解性的影响。结果表明，随着GLU接枝率的增加，热稳定性和生物降解性降低，但仍保持较高水平。最重要的是，将GLU掺入侧链可显着改善PASP-GLU的助洗剂性能。在最高接枝率下，钙离子螯合能力，CaCO_3的分散能力和碱缓冲能力的最大值分别达到233.2 mg，108.9 mg和1.70 mL，其中CaCO_3的分散能力和碱缓冲能力甚至比三聚磷酸钠更好

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