Thermal properties of PA 6 and PA 6 modified with copolyamides and layered silicates

• Published in: Journal of thermal analysis and calorimetry Vol. 101; no. 3; pp. 1027 - 1037
• Main Authors: Ryba, J., Ujhelyiová, A., Krištofič, M., Vassová, I.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.09.2010; Springer
• Subjects: Adipic acid; Analytical Chemistry; Applied sciences; Chemistry; Chemistry and Materials Science; Clay; Comparative analysis; Concentrates; Enthalpy; Exact sciences and technology; Fibers; Fibres; Inorganic Chemistry; Measurement Science and Instrumentation; Melting; Montmorillonite; Nanostructure; Organic polymers; Physical Chemistry; Physicochemistry of polymers; Polymer Sciences; Properties and characterization; Silicates; Thermal and thermodynamic properties; Thermal properties; Copolyamides; DSC; Nanoadditives; Thermal properties; Differential scanning calorimetry; Amidoamine copolymer; Bentonite; Mechanical properties; Caprolactam copolymer; Thermal analysis
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-010-0715-y

This article focuses on the thermal properties of PA 6 and additives, i.e. ternary copolyamides, concentrates consisting of binary or ternary copolyamides + nanoadditive montmorillonite Bentonite 11958 or Cloisite 15A and PA 6 fibres modified with Bentonite, copolyamide and concentrate. The copolyamides are prepared from ε-caprolactam as a major comonomer and nylon salts AN2 from adipic acid + 1-(2-aminoethyl)piperazine and ADETA from adipic acid + diethylenetriamine. All copolyamides and concentrates exhibit lower melting temperatures T m and lower melting enthalpies ΔH m compared to neat PA 6. PA 6 fibres modified with 0.25–2.5 wt% MMT exhibit higher melting enthalpies in comparison with unmodified PA 6 fibres. PA 6 fibres modified with 10 wt% of ternary copolyamide containing 21.4 wt% of comonomers AN2 and ADETA have higher melting enthalpy as well. PA 6 fibres modified with 10 and 20 wt% of concentrate containing the same ternary copolyamide + 5 wt% of MMT have higher melting enthalpies and higher tensile strength in comparison with these characteristics of unmodified PA 6 fibres.