Radius ofgyration(nm) for PpP(M=7:5×10°)in various mixed solvents at 20 C Mass fraction00.100.,200.300400.500.60 of non-solvent H2O+THF4394474514.140733.8223 H2O+ Acetone43.945447348849.247643.5 Ethanol+44946047448448:047.343.9 n-Hexane 水、乙醇:良溶剂,其它为非溶剂
Radius of gyration (nm) for PVP ( ) in various mixed solvents at 20 ℃ Mass fraction of non-solvent 0 0.10 0.20 0.30 0.40 0.50 0.60 H 2 O ＋THF 43.9 44.7 45.1 44.1 40.7 33.8 22.3 H 2 O ＋Acetone 43.9 45.4 47.3 48.8 49.2 47.6 43.5 Ethanol ＋ n-Hexane 44.9 46.0 47.4 48.4 48.0 47.3 43.9 5 M w = 7.5 ×10 水、乙醇：良溶剂，其它为非溶剂
The intrinsic viscosity [7(d L/g) of pmma in pure solvents and in mixed solvents at the composition of maximum n at 25 C M. Mecn PAc CiBu MeCN+PAc MeCN+BuOH PAc+CIBu MeCN+CIBu ×10-3 MeCN 0.550cm=0.509eCx=0.40 7340.1310.1390.159 0.242 0.228 0.153 0.283 8750.1390.1510.165 0.280 0.274 0.169 1240.1550.1700.176 0.416 1890.1780.1880.211 0.446 0.433 0.213 0.549 2320.1910.2070.234 0.504 0.488 0.237 0.633 654 nS。 Is 0851 ns n.s.. not solubl p: volume fraction of one component solvent
The intrinsic viscosity (dL/g) of PMMA in pure solvents and in mixed solvents at the composition of maximum at 25 ℃ MeCN PAc ClBu MeCN+PAc MeCN+BuOH PAc+ClBu MeCN+ClBu 73.4 0.131 0.139 0.159 0.242 0.228 0.153 0.283 87.5 0.139 0.151 0.165 0.280 0.274 0.169 - 124 0.155 0.170 0.176 - - - 0.416 189 0.178 0.188 0.211 0.446 0.433 0.213 0.549 232 0.191 0.207 0.234 0.504 0.488 0.237 0.633 654 n.s. n.s. n.s. - 0.851 n.s. - 0.40 ϕ MeCN = 0.55 ϕ ClB u = 0.50 ϕ MeCN = M w 3 10 − × [η] [η] n.s.: not solubl ϕ : volume fraction of one component solvent
良溶剂+劣溶剂(或非溶剂) 劣(非)溶剂+劣(非)溶剂 良溶剂+良溶剂 混合溶剂性能不能直接从相应的 两种组分溶剂的性能来推演
¾良溶剂＋劣溶剂（或非溶剂） ¾劣（非）溶剂＋劣（非）溶剂 ¾良溶剂＋良溶剂 混合溶剂性能不能直接从相应的 两种组分溶剂的性能来推演