Nylon rubber toughening

FRACTURE BEHAVIOUR OF SHORT GLASS FIBRE-REINFORCED RUBBER-TOUGHENED NYLON COMPOSITES... [Pg.399]

Abstract The effects of the amount of rubber, the concentration of fibres and the state of the fibre/matrix interface upon the mechanical behaviour of short glass fibre-reinforced rubber-toughened nylon 6 ternary blends are described. First, tensile tests were carried out on different intermediate materials and then on the ternary blends to derive the stress-strain curves and document the damage mechanisms. Fracture toughness tests were implemented on compact tension specimens and the results were correlated to fractographic observations and acoustic emission analysis to assess the role of the different constituents. [Pg.399]

Fracivre Behaviour of Short Glass Fibre-Reinforced Rubber- Toughened Nylon Composites 401... [Pg.401]

Figure 4 shows the tensile stress-strain curves of the different rubber-toughened nylon 6 materials. The main features are ... [Pg.404]

Glass fibre-reinforced rubber-toughened nylon 6... [Pg.407]

The characteristic values of the crack initiation and propagation parameters (Jic, Kjc and Tr) are listed in Table IV for the different ternary blends. In all cases the requirements for valid fracture toughness measurement were fulfilled. These results confirm that type B fibres are better suited as reinforcement for rubber-toughened nylon materials. But the marked reduction... [Pg.415]

Addition of brittle fibres to a rubber-toughened nylon 6 provides a higher stiffness but brittleness increases with the concentration of fibres whatever the state of the fibre/matrix interface. [Pg.417]

For most applications, in particular in the automotive industry, the toughness of nylon is insufficient. The most successful method developed for modifying brittle polymers is rubber-toughening. By incorporation of a minor amount of a dispersed rubber phase (Impact modifier) the fracture resistance is improved significantly and the impact strength can be increased severalfold. There is an unavoidable decrease in flexural modulus and tensile strength, but the balance of properties of the rubber modified nylon is much better than that of unmodified nylon. Several kinds of morphology which... [Pg.181]

Chang and Chou. Rubber-Toughening of Polycarbonate-Nylon Blends 281... [Pg.287]

Kes Oshinski, A. J., Keskkula, H., Paul, D. R. The role of matrix molecular weight in rubber toughened nylon 6 blends 2. Room temperature Izod impact toughness. Polymer Vol. 37 (1996) 22, 4909 918. [Pg.262]

Impact tests of pre-cavitated samples of rubber-toughened Nylon (pre-cavitation obtained by a slight tensile pre-straining at low deformation rate) demonstrated their impact behavior very similar to samples without initial cavities (Gaymans 1994). Similar results were reported by Dasari et al. (2010) for polypropylene and PP/CaCOs nanocomposites pre-cavitated during processing. They observed that the... [Pg.1237]

Nylon ("Zytel ST") n. A DuPont rubber-toughened nylon, identified by the initials standing for super-tough, claimed to be the most rugged engineering resin then (1977) available. It is superior to polycarbonate in impact strength, with notched Izod = 9J/ cm (17ft-lb//in.). [Pg.663]

More realistic interpretation of DBT, based on an idea of mechanical nature of this transition, was proposed based on studies of PC, PMMA, PE, rubber-toughened PP, and nylons (77). The concept of mixed mode of fracture has been used to analyze experimental data on temperature dependence of G/. [Pg.177]

Current micro-mechanical understanding of functional elastomer-nylon blends presumes a continuum behaviour of the nylon matrix and rubber particle inclusions, i.e. that the properties of the matrix are unaffected by the inclusion of rubber toughening particles and that the rubber particles do not contain subinclusions (2-7). Results... [Pg.120]

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