PURPOSE: To obtain a high-molecular polymer at a low cost by causing a monomer vapor to generate an ionized gas plasma under a pressure of about 1-atm, causing the plasma to initiate the polymn. of a monomer, and carrying out most part of the polymn. in the absence of the plasma.
CONSTITUTION: A monomer (or an aq. soln. or emulsion of the monomer) (e.g. a 50% aq. soln. of acrylamide) 2 is put into a treating chamber 1 where a plasma of the atmospheric pressure is generated; while a gas (e.g. helium) is being supplied through a gas supply pipe 3, voltage from an a.c. supply 4 is applied to a conductive pipe electrode 5 to form a discharge zone between electrodes 5 and 6 to thereby initiate the polymn. in a similar way to the conventional plasma-initiated polymn.; after a plasma is generated for a predetermined time, the gas supply pipe 3 and an exhaust pipe 7 are closed; and while the temp. of the treating chamber 1 is kept constant, the polymn. is conducted. In the above process, an ionized gas plasma is generated under a pressure of 0.2-3atm, pref, about 1atm.
YOSHIKAWA MASAHITO
TANUMA ITSUO
NAITO TOSHIO
KUSANO YUKIHIRO
AKIYAMA SETSUO
OKAZAKI SACHIKO
KOKOMA MASUHIRO
OKAZAKI SACHIKO
KOKOMA MASUHIRO