| 摘要 |
<p>The melt flow of a polyolefin is continuously modified in a melt-mixer by melting the polyolefin in the melt-mixer and adding a free radical generator at several addition zones, where all of the free radical generator is decomposed before leaving the melt- mixer. Pref. the free radical generator is an organic peroxide, pref. selected from: 2,5-dimethyl-2,5-di(t-butylperoxy)hexane; 2,5-dimethyl-2,5- di(t-butylperoxy)hexyne-3; di-t-Bu-, di-cumyl-, di-t-amyl-, and t-butyl cumyl-peroxides; alpha ,alpha -bis(t-butylperoxy)-di- isopropylbenzene; n-butyl-4,4-bis(t-butylperoxy)valerate; 1,1,- di-(t-butylperoxy)-3,3,5-trimethylcyclohexane; 1,1,-di-(t- butylperoxy)cyclohexane; 1,1,-di-(t-amylperoxy)cyclohexane; 2,2- di-(t-butylperoxy)butane; ethyl-3,3-di-(t-butylperoxy)butyrate; ethyl-3,3-di-(t-amylperoxy)butyrate; t-butylperoxyacetate; t- amylperoxyacetate; t-butylperoxybenzoate; t-amylperoxybenzoate; bis-(2-(1,1-dimethylethyl)peroxy-isopropyl)-benzene; and di-t- butyldiperoxyphthalate. The polyolefin is (a) a polypropylene homo-, co- and ter-polymer; (b) a crosslinkable polymer; or (c) comprises olefinic and non-olefinic monomers.</p> |
