A process for producing a modified polypropylene and a molded product

摘要

A process for producing a modified polypropylene having (A) a degree of branching of substantially 1, (B) a relationship between its melt tension (MS) at 230 DEG C and its intrinsic viscosity ( eta ) measured in tetralin at 135 DEG C expressed by an inequality $(C)\; a\; percentage\; of\; extraction\; residue\; in\; boiling\; xylene\; of\; 1\%\; by\; weight\; or\; less,\; which\; process\; comprises:\; adding\; 0.05\; to\; 10\; millimols\; of\; a\; cross-linking\; auxiliary\; to\; 100\; g\; of\; a\; linear\; polypropylene;\; mixing\; the\; cross-linking\; auxiliary\; and\; the\; linear\; polyethylene,\; irradiating\; the\; mixture\; with\; ionizing\; radiation\; so\; as\; to\; give\; an\; absorbed\; dosage\; of\; 1\; to\; 20\; kGy;\; and\; subsequently\; heat-treating\; the\; resulting\; material\; at\; 80\; DEG\; to\; 350\; DEG\; C.$