公开(公告)号：US5078925A

公开(公告)日：1992-01-07

申请号：US545482

申请日：1990-06-27

申请人： Richard J. Rolando ,  Dennis L. Krueger ,  Daniel E. Meyer ,  Thomas L. Insley

发明人： Richard J. Rolando ,  Dennis L. Krueger ,  Daniel E. Meyer ,  Thomas L. Insley

IPC分类号： C08J7/18 ,  D04H1/56

CPC分类号： C08J7/18 ,  D04H1/56 ,  C08J2323/12

摘要： Polypropylene articles are provided. The polypropylene articles include 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 irradiation polypropylene articles having olefinic unsaturation-containing monomers graft-polymerized thereon including 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.

摘要翻译： 提供聚丙烯制品。 聚丙烯制品包括具有通过以足以降解结晶聚丙烯的剂量的电离辐射而在其上接枝聚合的含有烯属不饱和单体的单体的非结晶介晶聚丙烯。 被照射的聚丙烯制品在长达至少约四个月的储存期后保持有用的拉伸性能。 进一步提供一种用于制备其上接枝聚合的含有烯属不饱和单体的辐射聚丙烯制品的方法，包括熔融挤出聚丙烯的步骤; 在挤出后立即淬火挤出的聚丙烯以提供非结晶的介晶聚丙烯; 用电离辐射可接枝聚合单体涂覆非结晶的不规则聚丙烯; 并用一定量的电离辐射照射涂覆的非结晶的不规则聚丙烯以使结晶聚丙烯降解并足以使单体接枝聚丙烯的表面。