| 摘要 |
Small amounts of peroxides which do not decompose to TBA and which have a half-life in the range of about 1.0 to 10 hrs. at 128 DEG C. are incorporated in polypropylene by thermal mechanical melting in an extruder. Control of molecular weight and molecular weight distribution is achieved as a function of the amount of peroxide added. The peroxides of choice are 2,2 di(t-amyl) peroxy propane and 3,6,6,9,9 pentamethyl-3 n-propyl-1,2,4,5 tetraoxacyclononane. |
