Contribution to covulcanization of elastomers and plastics

Abstract

Blends of natural rubberwith different types of polyolefins and blends of nitrile rubberwith poly(viny1 chloride) have been vulcanized by different vulcanizing systems and at various vulcanizing conditions. The mechanical and thermooxidative properties of the products are tested and compared with each other. On base of the results the vulcanization mechanism is discussed. Beitrag zur Covulkanisation von Elastomeren und PlastenMischungen von Naturkautschuk und verschiedenen PolyoleGnen sowie Mischungen von Nitrilkautschuk und Poly(vinylchlorid) wurden mit verschiedenen Vulkanisierungssystemen und bei unterschiedlichen Bedingungen vulkanisiert. Die mechanischen und thermooxidativen Eigenschaften der Produkte wurden ermittelt. Auf Basis der Ergebnisse wird der Vulkanisationsmechanismus diskutiert.

Maleated polypropylene film and wood fiber handsheet laminates

“…The highest mean tensile strengths were obtained from the iPP film treated at the 2:1 ratio, which was 76% greater than the untreated laminates. It is well known that addition of MA to wood fiber and PP composites increases the tensile properties of composites [9,[33][34][35]. Although all of the MA grafted laminates were significantly better than test samples without MA treatment, there was no statistically significant difference among the tensile strength of the MA loaded samples.…”

“…Among anhydride coupling agents, maleic anhydride (MA) as a copolymer has improved the mechanical properties of wood fiber-thermoplastic composites (WPC) [4][5][6][7]. Considerable research has been directed toward promoting interfacial interactions between polymer matrixes and wood fiber surfaces [8][9][10][11]. However, the treatment effects on the interfacial strength properties of WPC varied with the different fiber sources and polymer types.…”