Polycaprolactam filled with short glass fibres and microbeads. II. Elastic and ultimate properties of composites prepared by the anionic adiabatic polymerization

Abstract

HORSKP and KOLAMK: Polycaprolactam filled with short glass fibres and microbeads. I1 Table 4. -1 diabatic polymerization of caprolnctain with glass -Wt.% "C "C 1/1.5 32.7 142 209 15 40 95.8 573 0.384 l ) Polymerization was initiated with the system 0.3 mole-% Synhydrid and 0.3 mole-% phenyl isocyanate trimer; corrected initial polymerization temperature was Tocor = 135 + ATps (in "C) 2, Fibres and beads of average length 1, = 0.20 mm and diameter d , = 0.15 mm, respectively, were coated with 1.4 and 0.05 wt.% of y-aminopropyltriethoxysilane, respectively 3, Masimal temperature reached in the polymerization including crystallization 4, Polymerization halftime s, Time needed for reaching T,,,

Composites of alkaline poly(6-caprolactam) and short glass fibers: one-step synthesis, structure and mechanical properties

“…2 show the proportionality between the shear storage modulus G9 or the flexural creep modulus of composites and the volume fraction of SGF. As the incorporated volume fractions of SGF are rather low and resulting increase in modulus relatively small, we have not compared the experimental data with the prediction of existing models as we did it in our previous paper 11) . Experimental creep curves are usually fitted by a suitable equation, which facilitates storage of experimental data, evaluation of creep rate, interpolation or extrapolation of creep deformation, etc.…”

“…The initiator/activator system SYN/PIC = 0.3 mol-%/0.3 mol-% was selected for composite materials with regard to previous results [10][11][12][13] . Tab.…”

“…This procedure is used also for poly(6-caprolactam) (PCL) and other polyamides so that various types of polyamide composites reinforced with short glass or carbon fibers are commercially available 4,8) . Alternatively, the incorporation of particulate fillers 9) or short fibers [10][11][12][13] may precede the polymerization process. In this way, the damage (breaking and shortening) of short fibers is reduced because the viscosity of a monomer is much lower than that of a corresponding polymer.…”

One‐Step Synthesis of Hybrid Composites of Poly(6‐hexanelactam) Combining Solid Tribological Additives and Reinforcing Components

“…Tribological additives frequently decrease the polymerization degree, conversion, crystallinity, and size of spherulites in PCL matrix,16 which account for a decrease in the glass transition temperature, T g , thermal and dimensional stability, tensile strength, etc. Such deficiencies can partly be overcome with the aid of hybrid tribological composites,17 in which the incorporation of a reinforcing filler compensates for the drop in mechanical and engineering properties caused by tribological additives. The objective of this paper was to prepare PCL composites with promising combinations of available additives, i.e.…”

Physiological Role of Silent Receptors of Atrial Natriuretic Factor

“…50 After control periods, C-ANF-23 was administered intravenously as a bolus injection (10 ,ug per 0 kilogram of body weight) followed by a constant (19,20). Blood samples were collected in chilled Vacutainer tubes containing potassium Time (minutes) EDTA.…”