The Effect of Rubber Type and Rubber Functionality on the Morphological and Mechanical Properties of Rubber-toughened Polyamide 6/Polypropylene Nanocomposites

Abstract

ABSTRACT:Rubber toughened polyamide 6/polypropylene (PA6/PP) nanocomposites containing 4 wt % of organophilic modified montmorilonite (OMMT) were produced by melt compounding followed by injection moulding. Four different types of elastomer were incorporated into the blends as a toughener, i.e., ethylene-octene elastomer (POE), ethylene-propylene elastomer (EPR), maleated POE (POEgMAH) and maleated EPR (EPRgMAH). The influences of maleating on the interfacial adhesion and mechanical properties of the nanocomposites were investigated in term of mechanical testing, the X-ray diffraction (XRD) and scanning electron microscope (SEM) observation. The results showed that modulus and strength of the nanocomposites was not significantly affected by types of elastomer and their functionality. However, the toughness of the nanocomposites toughened by maleated elastomer was higher than the unmaleated elastomer. The SEM observation revealed that rubber functionality reduces the elastomer particle size in the PA6/PP matrix due to the in situ formation of graft copolymer between maleated elastomer and PA6 during melt processing. XRD revealed that the type of elastomer and functionality did not affect the dispersion of the organoclay in the system.

The use of polyfunctional monomers in the radical cure of chlorinated polyethylene

“…This is supported by the fact that the modulus of the rubber remains essentially unchanged at higher doses. 26 Elongation at break ( Figure 8) and residual elongation ( Figure 9) decrease significantly when augmenting the irradiation dose. Such decline is expected as the rubber becomes increasingly rigid as a consequence of the increase in crosslink density with irradiation.…”

Synthetic Talc and Talc‐Like Structures: Preparation, Features and Applications

“…Hybrid materials organic/inorganic with a clay matrix have been studied for around thirty years. These materials are used as environmental barriers as pollutant absorber, as fillers in polymers, as catalytic supports or as chemical sensors . The synthesis of organotalc was motivated by various applications for which natural talc is not or is less competitive.…”

“…Hybrid materials organic/inorganic with ac laym atrix have been studied for aroundthirty years. These materials are used as environmental barriers as pollutant absorber, [166] as fillers in polymers, [167,168] as catalytic supports or as chemical sensors. [169][170][171] The synthesis of organotalc was motivated by variousa pplications for which natural talc is not or is less competitive.A lthough the organic moieties covalently bound to the inorganic layer restrictt he use of high temperature, organotalc can find ab road range of applicationsasd etailed below.…”

Gamma irradiation of (styrene butadiene rubber)/(devulcanized waste rubber) blends modified by organoclay

“…The obtained results indicated that the decomposition temperature is significantly improved with the incorporation of the nano‐organoclay, suggesting the confirmation of exfoliated structures. The significant increases in thermal stability resulting from the exfoliated clay platelets may be due to kinetic effects, with the platelets retarding the diffusion of oxygen into the polymer matrix .…”