Synthesis and Properties of Novel Amphiphilic Polyamides

doi:10.11944/j.issn.1000-0518.2017.03.160214

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (3): 269-275.DOI: 10.11944/j.issn.1000-0518.2017.03.160214

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Synthesis and Properties of Novel Amphiphilic Polyamides

CHI Yongmei^a^b,XU Songjie^b,CAO Yuting^a,DONG Jian^a^b^*()

^aSchool of Material Science and Chemical Engineering,Ningbo University,Ningbo,Zhejiang 315211,China
^bSchool of Chemistry and Chemical Engineering,Shaoxing University,Shaoxing,Zhejiang 312000,China

Received:2016-05-23 Accepted:2016-08-19 Published:2017-02-27 Online:2017-02-27
Contact: DONG Jian
Supported by:
Supported by the National Natural Science Foundation of China(No.21674063), the Natural Science Foundation of Zhejiang Province(No.LY12E3001), the National Undergraduate Innovative Training Project(No.201310349004)

Abstract

Abstract:

To provide a theoretical basis for designing natural gas hydrate inhibitors and understanding the inhibition mechanism, and to analyze the nature and characteristics of the interactions between amphiphilic polyamides and water, water soluble poly(1,3-propylene citramide) was synthesized and based upon which, a new amphiphilic polymer was prepared by the modification with cyclohexyl isocyanate. The structure and properties of the product were characterized by proton nuclear magntic resonance spectroscopy, gel permeation chromatography and differential scanning calorimetry. The results show that the modified polymer forms nonfreezable bound water(NFBW) and the amount of the NFBW is twice the level in traditional kinetic gas hydrate inhibitors such as poly(N-vinylcaprolactam) or poly(N-vinylpyrrolidone). The specific heat capacities of water in the modified polymer increases remarkably by 36%. The hydrophobic interaction force between the polymer and water is enhanced, resulting in significant hydrophobic hydration restricted in the polymer. The modified polymers show strong hydrophobicity, leading to high levels of tightly bound water molecules and providing a necessary environment for increasing amount of NFBW.

Key words: water soluble polymer, hydrophobic force, non-freezable bound water, specific heat capacity

CHI Yongmei, XU Songjie, CAO Yuting, DONG Jian. Synthesis and Properties of Novel Amphiphilic Polyamides[J]. Chinese Journal of Applied Chemistry, 2017, 34(3): 269-275.

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Synthesis and Properties of Novel Amphiphilic Polyamides

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