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

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 chain structure on the thermal conductivity of expanded graphite/polymer composites

RSC Advances ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 10185-10191 ◽  
Author(s):  
Sha Deng ◽  
Jinwen Wang ◽  
Guiying Zong ◽  
Feng Chen ◽  
Songgang Chai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Polymer Composites ◽  
Polymer Chain ◽  
Expanded Graphite ◽  
Chain Structure

The thermal conductivity of expanded graphite (EG)/polymer composites is investigated in terms of polymer chain structures.

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