@article{oai:nagasaki-u.repo.nii.ac.jp:00016029,
 author = {古川, 睦久},
 issue = {15},
 journal = {長崎大学工学部研究報告, Reports of the Faculty of Engineering, Nagasaki University},
 month = {Jul},
 note = {Methods for the determination of the degree of crosslinking and the number of effective chains per unit volume in polyurethane networks have been described. The methods are as follws; 1) calculation from stoichiometry, 2) calculation from molecular weight of linear polyurethanes which were obtained by the degradation of crosslink site of cured polyurethane, 3) calculation from amine degradation, and 4) calculation from Young's modulus. The allophanate-cured polyurethanes prepared from PPG, TDI, and 1, 4-butanediol have been used as model networks in order to ascertain the validity of these methods. The parameters of network structure calculated from the experimental methods are lower than those from stoichiometry. The parameters calculated from method 2 and 3 were fairly close to those from Young's moduli. The properties of the primary chains which were the starting and the intermediate materials for preparing polyurethane networks have been studied with GPC, HPLC, IR, and UV., 長崎大学工学部研究報告, (15), pp.95-100; 1980},
 pages = {95--100},
 title = {PPG-TDI-BDポリウレタン網目の分析},
 year = {1980}
}