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【求助】 How to answer these questions about polymer
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1. The glass transition, Tg, for poly(ethylene) is well below 0, yet a dishpan made from poly(ethylene) retains its shape at temperatures well above 0. 2. Radical polymerization of methyl acrylate carried out in tetrahedronfuran solution generates polymer of relatively low molecular weight. 3. Whether the polymerization of an unknown monomer proceeds by a step-growth or chain-growth process can be determined experimentally. How would this be done [ Last edited by wizardfox on 2009-2-19 at 12:45 ] |
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