Studies on the structure of polyaspartic acid and its scale inhibition behavior

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  • 1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
    2. National Research Center of Industrial Water Treatment Engineering, Tianjin Research and Design Institute of Chemical Industry, Tianjin 300131, China

Received date: 2005-02-23

  Online published: 2010-10-01

Abstract

The polyaspartic acid(PASP) obtained through two methods: aminization and polymerization of maleic acid(methodⅠ) and thermal polycondensation of L-aspartic acid(methodⅡ) have been determined and compared by using a gel permeation chromatography and infra-red spectrum. The results show that the variety reaction route and conditions alter the average molecular weight(Mw) and its distribution of the products. The results of static state tests of scale inhibition show that the products obtained through methodⅠwith about Mw3 000, can give the same scale inhibition behavior as the products obtained through method Ⅱ with about Mw5 200. The results of SEM examination to scale type of CaCO3 indicate that the addition of polyaspartic acid can lead to aberrant crystal lattice.

Cite this article

Yang Hongjian, Wang Fang, Hou Kaihu . Studies on the structure of polyaspartic acid and its scale inhibition behavior[J]. Industrial Water Treatment, 2005 , 25(7) : 26 -28 . DOI: 10.11894/1005-829x.2005.25(7).26

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