caa a22 4500 465787878 CHVBK 20180323112014.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00983974 doi (NATIONALLICENCE)springer-10.1007/BF00983974 On the intermolecular and intramolecular branching distribution. in ethylene/α-olefin copolymers [Elektronische Daten] [Jianguo Wang, Deren Pang, Baotong Huang] Summary: For the complex phenomena of comonomer distribution in ethylene/α-olefin copolymers prepared on heterogeneous Ziegler-Natta catalysts, a branch distribution function P(b) was proposed to quantify the intermolecular branch distribution (InterBD). P(b) values calculated from solvents extraction fractions were found to correspond to the alleged sequence length distribution represented by r1·r2 as determined from13C NMR data. The InterBD is attributed to thermodynamically-controlled polymerization processes due to the presence of multiple active centers. Literature data also showed a decrease in reactivity parameter r1·r2 with increasing comonomer ratio. A diffusion-controlled model is suggested for the intramolecular branch distribution (IntraBD). Springer-Verlag, 1990 Wang Jianguo Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut Pang Deren Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut Huang Baotong Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 127-131 0170-0839 23:1<127 1990 23 289 https://doi.org/10.1007/BF00983974 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00983974 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Jianguo Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut NATIONALLICENCE 700 1- Pang Deren Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut NATIONALLICENCE 700 1- Huang Baotong Changchun Institute of Applied Chemistry, Academia Sinica, 130022, Changchun, Jilin, People's Republic of China aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/1(1990-01-01), 127-131 0170-0839 23:1<127 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer