Alteration of the mechanical and thermal properties of nylon 6/nylon 6,6 blends by nanoclay

Abstract

Nylon 6 [N(6)], nylon 6,6 [N(6,6)], and their blends at different clay loadings were prepared. The mix was melted and injected into strip-shaped samples. Mechanical and thermal analyses were performed to investigate the effect of blending and the incorporated clay on the mechanical and thermal properties. Enhancements in the Young's modulus and hardness were obtained for all of the nanocomposites, with a 55% increase in Young's modulus after the addition of 6 wt % nanoclay, although the improvement in tensile strength depended on the blend ratio, with greatest effects on the 50% N(6)/50% N(6,6) blend with increases of 44 and 59% for 2 and 4% clay loadings, respectively. Thermogravimetric analysis showed an enhancement in the thermal properties in the 50% N(6)/50% N(6,6) blend at 2% clay loading, and the blend exhibited ductile behavior at this loading. Increases in the crystallization peak temperatures of [10][11][12][13][14][15] in N(6,6) and the two blends 30% N(6)/70% N(6,6) and 50% N(6)/ 50% N(6,6) were observed after the addition of the clay. The nanoclay enhanced the c-/b-form crystals in N(6) and N(6,6) neat polymers and also in the blends. Fourier transform infrared spectroscopy FT-IR revealed the formation of hydrogen bonding and the possible formation of ionic bonds between the polymers and the nanoclay, which resulted in enhancements in the mechanical properties of the blends. The distribution of the nanoclay in the blend was well dispersed, as shown by X-ray diffraction analysis.

Influence of process variables on the characteristics of friction‐stir‐welded polyamide 6,6 joints

“…SEM micrographs of a) and b) fracture morphology of the weld at 1300 min À 1 , 17 mm/min and 0 degree; c) weld cross-sectional view; d) defect at the retreating side of the welded joint (1100 min À 1 , 7 mm/min and 0 degree), and e) fibrils formed on the fracture surface. 22]. Infrared spectrum of the welded sample F (1300 min À 1 , 20 mm/min and 0 degree) has the major bands with blunt and broad shoulders illustrating the strength of the intermolecular interaction to be low.…”

Effect of clay on melt crystallization, crystallization kinetics and spherulitic morphology of poly(trimethylene terephthalate) nanocomposites

“…The macro-sized and micro-sized fillers lack an intense interaction within the polymer matrix due to the limited interfacial area. In the past few years, polymer nanomaterials with substantial improvements in the mechanical, thermal, conductive, chemical, optical, electrical, and gas-barrier properties have drawn much attention [16][17][18][19][20][21][22][23][24][25]. These nano-sized fillers are miscible with the polymer matrix and have a significantly higher interaction with the polymer matrix compared to conventional macro-sized and micro-sized fillers.…”

Synergistic mechanical response of Nylon 6/Trogamid® T blends

“…[1][2][3][4] Most of the polymer blends reported in the literature are two phase systems or known as heterogeneous systems wherein the properties are governed by the phase morphology and the interface. Promising future with blends is expected from large numbers of research articles published on the topic.…”