scholarly journals Anionic Polymerization of 1,3-Cyclohexadiene. Effect of Reaction Temperature on Polymer Chain Structure.

2003 ◽  
Vol 60 (3) ◽  
pp. 138-140
Author(s):  
Itaru NATORI ◽  
Hideyuki YAMAGISHI
Keyword(s):  
Polymer Chain ◽  
Reaction Temperature ◽  
Anionic Polymerization ◽  
Chain Structure

Effect on Polymer Chain Structure Caused by the Molar Fraction of 4-Hydroxybutyrate in Poly(3-hydroxybutyrate- co -4-hydroxybutyrate)

2012 ◽  
Vol 602-604 ◽  
pp. 776-780
Author(s):  
Zhi Qiang Li ◽  
Mei Li ◽  
Wei Jia Fan
Keyword(s):  
Molecular Weight ◽  
Intrinsic Viscosity ◽  
Polymer Chain ◽  
Molar Fraction ◽  
Chain Structure ◽  
The Other ◽  
Mean Square ◽  
Polarizing Microscope ◽  
Other Hand ◽  
The Mean

Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)copolymer [P(3HB-co-4HB)] is a kind of biodegradable high molecular polymer produced by bioaccumulation. Because of the good biodegradability and biocompatibility, P(3HB-co-4HB)s have attracted wide attention . At first, the intrinsic viscosity[η] in good solvent of P(3HB-co-4HB) s with varying contents of 4HB was investigated in different temperature. Second, observed the changes of crystallization gathered state caused by the varying contents of 4HB by polarizing microscope. The results show that to the P(3HB-co-4HB)s in same molecular weight, the intrinsic viscosity[η] in good solvent barely changes when the mole fractions of 4HB increase. On the other hand, the mean square end to end distances[0] of macromolecular flexible chains increase with the mole fractions of 4HB. At the same time, the states of aggregation change from spherulites to dendrites. In this investigation, we discuss the reasons of the differences in depth.

3D Single Cyclized Polymer Chain Structure from Controlled Polymerization of Multi-Vinyl Monomers: Beyond Flory–Stockmayer Theory

2011 ◽  
Vol 133 (33) ◽  
pp. 13130-13137 ◽  
Author(s):  
Yu Zheng ◽  
Hongliang Cao ◽  
Ben Newland ◽  
Yixiao Dong ◽  
Abhay Pandit ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Chain Structure ◽  
Vinyl Monomers ◽  
Controlled Polymerization

Effect of polymer chain structure and chain distance on luminescent efficiency

1998 ◽  
Vol 43 (12) ◽  
pp. 1015-1018
Author(s):  
Hong Zhiyong ◽  
Zhao Xiaojiang ◽  
Ma Dongge ◽  
Wang Daike ◽  
Jing Xiabin ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Chain Structure

Recent Advances in Anionic Polymerization

1981 ◽  
Vol 54 (3) ◽  
pp. 627-640 ◽  
Author(s):  
Adel F. Halasa
Keyword(s):  
Carbon Dioxide ◽  
Ethylene Oxide ◽  
Polymer Chain ◽  
Anionic Polymerization ◽  
Living Polymerization ◽  
Thermoplastic Elastomers ◽  
Synthetic Polymer ◽  
Recent Advances

Abstract In summary, one can say that the versatility of living polymerization makes it a very useful and unique technique. Synthetic polymer chemists can utilize the lithium at the end of the chain to add polymer-like conjugated monomers, in order to tailor-make the polymer chain, or they can use chelating diamines to change the microstructure of the polymer chain. They can also run hydrogenation on anionically prepared polydienes to produce thermoplastic elastomers. They can transform anionically made polymer chain ends by adding ethylene oxide, carbon dioxide and halogens. This paper has emphasized recent advances in this field.

Polymer association and chain structure in anionic polymerization of dienes

1962 ◽  
Vol 2 (2) ◽  
pp. 106-107 ◽  
Author(s):  
Maurice Morton ◽  
N. Calderon ◽  
L. J. Fetters ◽  
J. F. Meier
Keyword(s):  
Anionic Polymerization ◽  
Chain Structure

Adsorption of monodisperse polybutadienes on carbon black, 1 Adsorption from dilute and semi-dilute solutions

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Kathy Vuillaume ◽  
Bassel Haidar ◽  
Alain Vidal
Keyword(s):  
Carbon Black ◽  
Polymer Chain ◽  
Anionic Polymerization ◽  
Polymer Concentration ◽  
Three Dimensional ◽  
Percolation Process ◽  
Molecular Weights ◽  
Polymer Filler ◽  
Adsorbed Polymer ◽  
Filler Network

Abstract A series of polybutadienes (PBs) of different molecular weights (in the range of 3000 to 120 000) but of identical microstructure (1,2-PB content ≈ 80%) was synthesized via anionic polymerization. The adsorption in solution of the various monodisperse PBs on carbon black (CB) was studied for different polymer/ CB ratios as well as for polymer and CB concentrations in the range of 0.1 to 100 g/l. The amount of adsorbed polymer was followed and was found to be essentially governed by the polymer concentration, which determines also the conformation of the polymer chain on the filler surface. CB concentration didn’t prove to be a pertinent parameter, whereas the polymer/filler ratio was found to control the formation of the three-dimensional polymer-filler network on the basis of a percolation process. Results are discussed with respect to the available theories.

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