Increasing Reinforcing Glass Fabric Impregnability by Using Adhesives
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NTERPRISES AND INSTITUTES UDC 677.047.62:666.189.212
INCREASING REINFORCING GLASS FABRIC IMPREGNABILITY BY USING ADHESIVES N. M. Demina,1, 2 O. N. Titova,1 and I. P. Zabrodina1 Translated from Steklo i Keramika, No. 1, pp. 33 – 39, January, 2013. The possibility of increasing the anhydride epoxy bonding agent impregnability of glass fabric, made from aluminum borosilicate glass, by introducing adhesives into the serially produced lubricant 4s is studied. A wide range of wetting agents, produced by different global manufacturers for fiber and organosilicon coupling agents, was tested by determining the bonding agent impregnability over the height in a capillary. The impregnability of reinforcing glass fabric was increased considerably by improving the lubricant as well as counter-modification of the bonding agent. Key words: fiberglass, wetting agent, silane, lubricant, impregnability, bonding agent.
1220, LE-743 (Momentive), Q2-5211 (Dow Corning GmbH), Sandoclean PCJ (Clariant), Tween-81 (Americas, Ins. Atlas Point). In industry, all continuous glass fibers are coated by lubricants at the output [2].The composition of the lubricant has a very large effect on the quality of the glass fiber and composite based on it. Today, in glass fiber production the most promising lubricant for obtaining epoxy fiberglass is the lubricant 4s. In the present work, the effectiveness of wetting agents as additives to the lubricant 4s in concentrations guaranteeing the stability of the experimental variants of wetting agents during three-day storage (the technology using silane lubricants for glass fiber permits using freshly prepared composition within 3 days). The 4s compositions based lubricants improved by wetting agents are presented in Table 1. The impregnability data show convincingly that the glass fibers treated with the following modifications of the lubricant 4s possess the best impregnability by anhydride epoxy bonding agent: non-fluorinated organo modified siloxane surfactant Coatosil 1220 (see Table 1, composition c), synergetic mixture of alkyl ethoxylates and fatty alcohols Sandoclean PCJ (Table 1, composition m), siloxane copolymer polyalkyleneoxide Silwet L-7210 (Table 1, composition i), mixture of non-ionic surfactants Nioksol NS-SM (Table 1, composition g), sorbitan derivative mono-9-octadecanoate poly(oxy-1,2-ethanediol) Tween-81 (Table 1, composition j) (Fig. 1). It was determined that the introduction of the lubricants mentioned above into the serially produced lubricant 4s considerably increases the rate of permeation during the first
The performance of glass reinforced plastics depends on the physical-chemical characteristics of the initial components — polymer and reinforcing material — and their ratio and integration quality in the composition [1]. The interaction of the components at the polymer – reinforcing filler interface plays an important role. Increasing the strength of fiberglass is a very important problem. This can be accomplished by, among other things, increasing the polymer impregnability of t
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