High performance polyamide 6 composites prepared by reactive extrusion

• Published in: Polymer composites Vol. 35; no. 5; pp. 985 - 992
• Main Authors: Shao, Hui-Ju, Wu, Bin, Guo, Jian-Bing, Qin, Shu-Hao, Lu, Sheng-Jun
• Format: Journal Article
• Language: English
• Published: Hoboken, NJ Blackwell Publishing Ltd 01.05.2014; Wiley
• Subjects: Applied sciences; Composites; Differential scanning calorimetry; Dynamics; Exact sciences and technology; Extrusion; Forms of application and semi-finished materials; Lithium chlorides; Mechanical properties; Nanostructure; Polyamide resins; Polymer industry, paints, wood; Polymer matrix composites; Technology of polymers; Polymer blends; Olefin copolymer; Epoxy resin; Mechanical properties; Lithium Chlorides; Dispersion reinforced material; Organic anhydride; Crystallinity; Experimental study; Functional polymer; Silica; Composite material; Property formulation relationship; Tensile strength; Amide 6 polymer; Impact strength; Aliphatic polymer; Ethylene copolymer; Extrusion; Nanocomposite
• ISSN: 0272-8397; 1548-0569
• DOI: 10.1002/pc.22744

To improve the properties of polyamide 6 (PA6) composites, a series of modified PA6 composites was prepared by reaction extrusion. An amorphous PA6 was first obtained by the complexing reaction of Li+ in lithium chloride with amino groups, and then epoxy resins, nano‐SiO2 as well as POE‐g‐MAH were in turn added into the PA6/LiCl system. The effect of different additives on the crystallization behavior and mechanical properties of PA6 composites was well‐studied by X‐ray diffraction (XRD), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), scanning electron microscopy (SEM), and mechanical properties tests. The results demonstrated that PA6 was amorphous at 6 phr lithium chloride and a network structure was formed in PA6 matrix in the presence of epoxy resins, thus the mechanical properties of composites greatly were enhanced. However too many nano‐SiO2 particles might impair the tensile strength of PA6 composites. Additionally, a PA6 composite with excellent properties was obtained in the presence of POE‐g‐MAH due to the crystal form change in PA6 matrix and the strong interaction between PA6 and POE‐g‐MAH. POLYM. COMPOS., 35:985–992, 2014. © 2013 Society of Plastics Engineers