摘要:
A process for the production of porous phenolic resin fibers is disclosed, which process comprises graft-polymerizing to phenolic resin fibers a vinyl group-containing monomer capable of forming a thermally decomposable polymer, and thereafter subjecting the fibers to a heat treatment at a temperature high enough to cause thermal decomposition of the graft polymer. The product thus obtained is excellent in heat-resistance and adiabatic property in addition to useful properties inherent to phenolic resin fibers.
摘要:
A method of preparing a gel from carboxymethyl cellulose alkali metal salt, which is an anionic cellulose derivative, by using acid or acid solution. To increase the strength and the elasticity of a gel, a water-insoluble metal compound or organic reinforcement is added when mixing. The obtained gel is one of environmentally friendly type gels because the raw material is derived from plant.
摘要:
Carbon fibers with a large specific surface area are obtained by a process which comprises the steps of:(a) providing cured novolak resin fibers;(b) impregnating the novolak resin fibers with a polymerizable vinyl monomer;(c) polymerizing the vinyl monomer; and(d) carbonizing the novolak resin fibers containing the polymerized vinyl monomer.
摘要:
To provide a method for producing a gel of a carboxymethyl cellulose alkali metal salt, in which a gel having high elasticity and strength and also having excellent water retention and durability can be obtained inexpensively and simply.The method for producing a gel of a carboxymethyl cellulose alkali metal salt of the present invention includes previously mixing a mixture containing a carboxymethyl cellulose alkali metal salt and a water retention agent and subsequently mixing the resulting mixture with an acid aqueous solution to obtain a gel.
摘要:
A method of preparing a gel from carboxymethyl cellulose alkali metal salt, which is an anionic cellulose derivative, by using acid or acid solution. To increase the strength and the elasticity of a gel, a water-insoluble metal compound or organic reinforcement is added when mixing. The obtained gel is one of environmentally friendly type gels because the raw material is derived from plant.