Pozzar Franco, Sassi Alessandro, Pace Giuseppe, Lora Silvano, D'Archivio Angelo Antonio, Jeràbek Karel, Grassi Alfonso, Corain Benedetto
Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
Chemistry. 2005 Dec 9;11(24):7395-404. doi: 10.1002/chem.200500679.
Six gel-type functional resins, that is, three poly-DMAA-co-TMPTP (DMAA = N,N-dimethylacrylamide, TMPTP = trimethylolpropyltrimethacrylate) samples with different degrees of cross-linking (0.6, 1.2, 1.7 % mol) and three poly-DMAA-co-MA-co-TMPTP (MA = methacrylic acid, ca. 5.5 % mol) samples with 1.7, 3.5, and 7 % mol cross-linking were investigated with ISEC (inverse steric exclusion chromatography), and ESR and CP-MAS (cross polarization magic angle spinning) 13C NMR spectroscopy after swelling in water and other solvents. This unprecedented combination of conceptually independent physicochemical techniques provides a thorough overall consistent picture of the morphology of the resins on the nanometer scale and of the molecular accessibility of the swollen polymer framework to the paramagnetic probe TEMPONE (2,2,6,6-tetramethyl-4-oxo-1-oxypiperidine) and to selected solvents.
六种凝胶型功能树脂，即三种具有不同交联度（0.6%、1.2%、1.7%摩尔）的聚-DMAA-co-TMPTP（DMAA = N,N-二甲基丙烯酰胺，TMPTP = 三羟甲基丙烷三甲基丙烯酸酯）样品以及三种交联度分别为1.7%、3.5%和7%摩尔的聚-DMAA-co-MA-co-TMPTP（MA = 甲基丙烯酸，约5.5%摩尔）样品，在水中和其他溶剂中溶胀后，采用反相空间排阻色谱（ISEC）、电子自旋共振（ESR）和交叉极化魔角旋转（CP-MAS）13C核磁共振光谱进行了研究。这种前所未有的将概念上独立的物理化学技术相结合的方法，提供了树脂在纳米尺度上的形态以及溶胀聚合物骨架对顺磁探针TEMPONE（2,2,6,6-四甲基-4-氧代-1-氧代哌啶）和选定溶剂的分子可及性的全面且一致的图景。
