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Blends of nylon 6 and polyethylene were investigated over a range of compositions. The polyethylenes used were grafted with maleic anhydride and, thus, have the potential to react with the amine end groups of nylon 6 during melt processing. This study focuses on the effects of the concentration, viscosity and functionality of the maleated polyethylenes (PE-g-MA) on the rheological, morphological,...
Blends of ethylene–propylene rubber (EPM) and nylon 6 are immiscible and highly incompatible. These blends are characterised by a two-phase morphology, narrow interface, and poor physical and chemical interactions across the phase boundaries. Therefore a reactive route was employed to compatibilise these blends by the addition of maleic anhydride grafted EPM (EPM-g-MA). In this reactive route, the...
The isothermal crystallization behaviour has been investigated for several compositions of blends between nylon 6 (N6) and the liquid crystal copolyester Vectra using calorimetric and X-ray diffraction techniques. Differences in the crystallization rates have been related to the structural properties of these systems by means of WAXS and SAXS real time experiments using synchrotron radiation. Other...
Blends of nylon 6 and ethylene-propylene rubber, grafted with maleic anhydride, (EPR-g-MA) were prepared using a melt blending process. For certain compositions, nylon 6 forms finely dispersed particles due to the reaction of the polyamide amine end groups with the grafted maleic anhydride, that have the potential to reinforce the elastomer matrix. This study focuses on the effects of the content...
High performance properties are increasingly needed in fibers for industrial applications. Such properties have been achieved in both flexible and intrinsically stiff polymers, but only through specialized and expensive spinning methods. In this work, the potential of achieving high performance mechanical behavior in nylon 6 using a conventional spinning process was explored. We report the formation...
Blends of nylon 6 with the liquid crystal copolyester Vectra have been prepared from the melt with different compositions, and their thermal behaviour has been analysed by differential scanning calorimetry (d.s.c.) and X-ray diffraction (WAXS) using syncrotron radiation, as a function of temperature and thermal treatment. The structural properties of these blends have been found to be very sensitive...
Melt-mixed blends of Poly(vinyl alcohol) (PVOH) with Nylon 6 were found to have good mechanical properties in the entire composition range. Determination of the glass transition temperature by dynamic mechanical analysis showed one broad T g for the compositions rich in Nylon 6. In the case of the blends rich in PVOH, two T g 's were obtained, one close to that of the pure PVOH and...
Nylon 6-polyethersulfone (PES)-nylon 6 block copolymers were synthesized by anionic polymerization of ε-caprolactam using chlorine-terminated PES, a polymeric activator. The structure and properties of these block polymers were examined using infra-red, nuclear magnetic resonance, differential scanning calorimetry, transmission electron microscopy, and thermogravimetric analysis. The compatibilizing...
Polymer blend films of polyaniline and nylon 6 were prepared from homogeneous solutions in formic acid at various weight ratios of polyaniline and nylon 6. Free standing, lustrous and flexible films were obtained by casting. The maximum conductivity of the film was about 0.2 S cm -1 , corresponding to a weight ratio of 0.5 wt/wt polyaniline (PAni) and nylon 6. The film exhibits semiconducting...
Izod impact strength was measured as a function of temperature for blends of nylon 6 with maleated and non-maleated styrene-hydrogenated butadiene-styrene triblock copolymers, SEBS, and ethylene/propylene random copolymers, EPR, to determine the effects of polyamide molecular weight, rubber type, and rubber particle size on the ductile-brittle transition temperature. In general, the ductile-brittle...
The effects of polyamide molecular weight on morphology generation in nylon 6 blends with maleated elastomers are described. The elastomers used include styrene-butadiene-styrene block copolymers with a hydrogenated mid-block, SEBS, and versions with X% grafted maleic anhydride, SEBS-g-MA-X%, and an ethylene/propylene copolymer, EPR, and a maleated version EPR-g-MA. The molecular weight of the nylon...
Oriented iodine-doped nylon 6 specimen which was prepared in an I 2 -KI aqueous solution was immersed into a KI aqueous solution. The 're-immersed' specimen indicated an irregular intercalation of iodine stacked between hydrogen-bonded planes of nylon 6 in the complex. In the irregular stacking, iodine atoms or polyiodides are not intercalated between all of the interlayer region, while...
The Izod impact strength of blends of nylon 6 with maleated and non-maleated styrene-hydrogenated butadiene-styrene triblock copolymers, SEBS, and ethylene/propylene random copolymers, EPR, is influenced by the molecular weight of the nylon 6 phase, the rubber particle size, and rubber type. The upper and lower particle size limits for super-toughening were found to be dependent on the polyamide...
The miscibility of blends of nylon 6 with poly(maleic anhydride-co-vinyl acetate) (poly(MAH-co-VAc)), or hydroxylated poly(maleic anhydride-co-vinyl acetate) (poly(MAH-co-VAc)H) was investigated by means of Fourier transform infra-red (FTi.r.) spectroscopy, differential scanning calorimetry (d.s.c.), and X-ray diffraction. Poly(MAH-co-VAc) was prepared by radical copolymerization and the copolymers...
Two types of elastomers grafted with maleic anhydride (MA), an ethylene-propylene random copolymer 9EPR) and a styrene-ethylene/butylene-styrene triblock copolymer (SEBS) were found to function both as impact modifiers and compatibilizers for nylon 6/polypropylene blends. The maleic anhydride grafted to the rubber reacts with the amine end-groups of the polyamide, forming a rubber-nylon 6 graft copolymer...
The morphology of nylon 6/polypropylene blends modified with maleated rubbers, such as styrene-ethylene/butylene-styrene triblock copolymers (SEBS-g-maleic anhydride (MA)) and ethylene-propylene random copolymers (EPR-g-MA), is affected by changes in the level of functionality of the rubber. By adjusting this level of functionality it is possible to induce drastic changes in the morphology of blends...
The processes that occur during the deformation of nylon 6/polypropylene blends modified with maleated rubbers were identified by dilatometric measurements and electron microscopy. These toughening mechanisms were found to depend on the type of rubber used as modifier (ethylene-propylene random copolymer, EPR-g-maleic anhydride (MA), or styrene-ethylene/butylene-styrene triblock copolymer, SEBS-g-MA),...
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