Polypropylene articles and method for preparing same.
摘要
Polypropylene articles are provided. The polypropylene articles comprise non-crystalline mesomorphous polypropylene having olefinic unsaturation-containing monomers graft-polymerized thereon by ionizing radiation in a dosage sufficient to degrade crystalline polypropylene. The irradiated polypropylene articles retain useful tensile properties after storage periods of as long as at least about four months. Further provided is a method for preparing irradiated polypropylene articles having olefinic unsaturation-containing monomers graft-polymerized thereon comprising the steps of melt extruding polypropylene; quenching the extruded polypropylene immediately after extrusion to provide non-crystalline mesomorphous polypropylene; coating the non-crystalline mesomorphous polypropylene with an ionizing radiation graft-polymerizable monomer; and irradiating the coated non-crystalline mesomorphous polypropylene with a dosage of ionizing radiation sufficient to degrade crystalline polypropylene and sufficient to effect graft-polymerization of the monomer onto the surface of the polypropylene.
申请公布号
EP0297741(A2)
申请公布日期
1989.01.04
申请号
EP19880305311
申请日期
1988.06.10
申请人
MINNESOTA MINING AND MANUFACTURING COMPANY
发明人
ROLANDO, RICHARD J. C/O MINNESOTA MINING AND;KRUEGER, DENNIS L. C/O MINNESOTA MINING AND;MEYER, DANIEL E. C/O MINNESOTA MINING AND;INSLEY, THOMAS I. C/O MINNESOTA MINING AND