Preparation of Bio-Based Polyamide Elastomer by Using Green Plasticizers.

Miaomiao He,Zhao Wang,Runguo Wang,Qingxiu Jia,Liqun Zhang

doi:10.3390/polym8070257

Abstract

The purpose of this work was to study the effects of three green plasticizers H2O, glycerol, and soybean oil, on the properties of bio-based BDIS polyamides. The BDIS polyamides synthesized from the following biomass monomers: 1,4-butanediamine (BD), 1,10-decanediamine (DD), itaconic acid (IA), and sebacic acid (SA). It is interesting to note that the amorphous BDIS (IA-80%) polyamide was changed from the glassy state to the rubbery state after water soaking and induced crystallization at the same time. The H2O-plasticized non-crosslinked BDIS (IA-80%) polyamides can be very useful for the preparation of physical water gel. The glycerol- and soybean oil-plasticized BDIS (IA-80%) polyamides displayed excellent toughness. The plasticized BDIS (IA-80%) polyamides were characterized by Fouriertransform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), mechanical testing, and X-ray diffraction (XRD).

Highlights

Polyamides (PAs), with their versatile properties and wide applications, play an essential role in our daily life
The plasticizing effect was investigated by using various various experimental techniques, like Fouriertransform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and mechanical tests. These plasticized experimental techniques, like FTIR, DSC, XRD, and mechanical tests. These plasticized amorphous amorphous BDIS (IA-80%) polyamides, which were obtained from biomass monomers, and BDIS (IA-80%) polyamides, which were obtained from biomass monomers, and water-plasticized water-plasticized BDIS (IA-80%) polyamide showed good bio-compatibility (as shown in BDIS (IA-80%) polyamide showed good bio-compatibility, which makes it useful for applications in biomedical materials
At the same plasticization time, the swelling ratio of BDIS (IA-80%) polyamide plasticized with soybean oil is lower than that of the BDIS (IA-80%) polyamide plasticized with water or glycerol

Summary

Introduction

Polyamides (PAs), with their versatile properties and wide applications, play an essential role in our daily life. Polyamides are known to be hygroscopic, because of the existence of a large number of hydrophilic amide groups, which can hydrogen bond with the sorbed water molecules. Plasticization with water lowers the glass transition temperature of the polyamides which, in turn, reduces the stiffness of the material and enhances the toughness [5]. It is generally accepted that water is absorbed in the amorphous phase that induces reorganization of the hydrogen bond structure [6,7]. The amorphous phase is not homogeneous, but consists of regions with different mobility [8,9]. It was recently shown that solvation of amide groups by water molecules, inhibiting crystallization, and/or allowing the dissolution of crystallites, as observed in water-immersed Nylon 46 [11,12,13]. Amide group interactions may be efficiently shielded by aqueous ionic solutions as well [14]

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