Polymerisation of Styrene with Dispersion of Natural Bentonite

The Laws Governing the Formation of Thermoplastic Matrices during the Chemical Forming of Continuously Reinforced Thermoplastics

“…The investigation was conducted on several variants of the "glass fabric-polystyrene" model composition, with typical volumes of reinforcement in the range V r = 0.5-0.65. Such a composition of the reinforced thermoplastic is governed not only by the wide availability and economy of its components but also by the availability of first-hand experience of the chemical forming of plastics based not only on a glass-fibre-reinforced polystyrene matrix [1] but also on a finely filled polystyrene matrix [4,5].…”

“…However, the most active factor must be acknowledged to be the specific influence of the chemical components of the glass fibre. On the basis of known data [4,5], the numerous components not only predetermine, to different degrees, the magnitude of the average molecular weight of polystyrene (from 12 000 to 38 000 or more) but also are capable of affecting the mechanism of the polymerisation process in different ways, making it a radical mechanism in some cases and an ionic mechanism in others. The combination of these factors evidently becomes the main reason for the considerable reduction in the molecular weight of the polystyrene matrix in the composition of the reinforced thermoplastic by comparison with unfilled polystyrene.…”