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    • 17. 发明授权
    • Polypropylene articles and method for preparing same
    • 聚丙烯制品及其制备方法
    • US4950549A
    • 1990-08-21
    • US326409
    • 1989-03-20
    • Richard J. RolandoDennis L. KruegerDaniel E. MeyerThomas I. Insley
    • Richard J. RolandoDennis L. KruegerDaniel E. MeyerThomas I. Insley
    • C08J7/18D04H1/56
    • C08J7/18D04H1/56C08J2323/12Y10T428/31855
    • 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.
    • 提供聚丙烯制品。 聚丙烯制品包含具有通过电离辐射在其上接枝聚合的具有烯属不饱和键的单体的非结晶的不规则聚丙烯制品,其用量足以降解结晶聚丙烯。 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。