Effects of polymer molecular weight, concentration, and role of polyethylene glycol as additive on polyacrylonitrile homopolymer membranes

2013 ◽  
Vol 54 (10) ◽  
pp. 2375-2391 ◽  
Author(s):  
Swapna Rekha Panda ◽  
Sirshendu De
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Polymer Molecular Weight ◽  
Weight Concentration

Preparation and Properties of Polydienes

1973 ◽  
Vol 46 (4) ◽  
pp. 1055-1067 ◽  
Author(s):  
W. M. Saltman ◽  
L. J. Kuzma
Keyword(s):  
Molecular Weight ◽  
Nickel Catalyst ◽  
Marked Effect ◽  
Polymerization Rate ◽  
Cobalt Catalysts ◽  
Trans Content ◽  
Polymer Molecular Weight ◽  
Initiation Step ◽  
Butadiene Polymerization

Abstract In summary there are presented some new data on the initiation step for poly-(butadiene) polymerization with the AlEt3-Ni-BF3 catalyst which describe what appears to be a “settling down” period of newborn chains at the π-bonded nickel catalyst site. This leads to a segment of higher trans content at the end of each high cis-1,4-poly(butadiene) chain. Comparisons between nickel and cobalt catalysts seem to point up their differences rather than their similarities. We have described the role of water in effectively changing the identity of the aluminum alkyl which in turn has a marked effect on the polymerization rate, on the polymer molecular weight and the extent of crosslinking.

Determining the Role of Polymer Molecular Weight for High-Performance All-Polymer Solar Cells: Its Effect on Polymer Aggregation and Phase Separation

2015 ◽  
Vol 137 (6) ◽  
pp. 2359-2365 ◽  
Author(s):  
Hyunbum Kang ◽  
Mohammad Afsar Uddin ◽  
Changyeon Lee ◽  
Ki-Hyun Kim ◽  
Thanh Luan Nguyen ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Phase Separation ◽  
High Performance ◽  
Polymer Solar Cells ◽  
Polymer Molecular Weight

scholarly journals Reinforcement of macroscopic carbon nanotube structures by polymer intercalation: The role of polymer molecular weight and chain conformation

2005 ◽  
Vol 72 (24) ◽  
Author(s):  
C. J. Frizzell ◽  
M. in het Panhuis ◽  
D. H. Coutinho ◽  
K. J. Balkus ◽  
A. I. Minett ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Carbon Nanotube ◽  
Chain Conformation ◽  
Polymer Molecular Weight

scholarly journals Chitosan-Mediated siRNA Delivery In Vitro: Effect of Polymer Molecular Weight, Concentration and Salt Forms

2010 ◽  
Vol 11 (1) ◽  
pp. 64-72 ◽  
Author(s):  
Sunee Techaarpornkul ◽  
Sirirat Wongkupasert ◽  
Praneet Opanasopit ◽  
Auayporn Apirakaramwong ◽  
Jurairat Nunthanid ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Sirna Delivery ◽  
Polymer Molecular Weight ◽  
Weight Concentration ◽  
Vitro Effect ◽  
Salt Forms

Palladium—polyethylene glycol quasitemplate electroplates: The effect of polymer molecular weight

2005 ◽  
Vol 50 (24) ◽  
pp. 4752-4762 ◽  
Author(s):  
T.Ya. Safonova ◽  
D.R. Khairullin ◽  
G.A. Tsirlina ◽  
O.A. Petrii ◽  
S.Yu. Vassiliev
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Polymer Molecular Weight
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