Understanding nucleophiles effects in fast living cationic polymerisation of isobutyl vinyl ether in a microflow system from stability and activity of propagating chains

2021 ◽  
Author(s):  
Dan Xie ◽  
Yangcheng Lu
Keyword(s):  
Vinyl Ether ◽  
Initiation System ◽  
Cationic Polymerisation

Previous studies into fast living cationic polymerisation have rarely focused on the effects of nucleophiles, which are crucial in determining a suitable initiation system. In this work, taking the polymerisation...

scholarly journals Statistical Copolymers of n-Butyl Vinyl Ether and 2-Chloroethyl Vinyl Ether via Metallocene-Mediated Cationic Polymerization. A Scaffold for the Synthesis of Graft Copolymers

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1510 ◽  
Author(s):  
Zouganelis ◽  
Choinopoulos ◽  
Goulas ◽  
Pitsikalis
Keyword(s):  
Vinyl Ether ◽  
Graft Copolymers ◽  
Structural Parameters ◽  
Theoretical Models ◽  
Size Exclusion ◽  
Sequence Length ◽  
Reactivity Ratios ◽  
Scanning Calorimetry ◽  
Initiation System ◽  
Grafting From

The cationic statistical copolymerization of n-butyl (be) and 2-chloroethyl vinyl ether (CEVE), is efficiently conducted using bis(η5-cyclopentadienyl)dimethyl zirconium (Cp2ZrMe2) in combination with tetrakis(pentafluorophenyl)borate dimethylanilinum salt [B(C6F5)4]–[Me2NHPh]+, as an initiation system. The reactivity ratios are calculated using both linear graphical and non-linear methods. Structural parameters of the copolymers are obtained by calculating the dyad sequence fractions and the mean sequence length, which are derived using the monomer reactivity ratios. The glass transition temperatures (Tg) of the copolymers are measured by Differential Scanning Calorimetry (DSC), and the results are compared with predictions based on several theoretical models. The statistical copolymers are further employed as scaffolds for the synthesis of graft copolymers having poly(vinyl ether)s as a backbone and either poly(ε-caprolactone) (PCL) or poly(l-lactide) (PLLA) as side chains. Both the grafting “onto” and the grafting “from” methodologies are employed. The reaction sequence is monitored by Size Exclusion Chromatography (SEC), NMR and IR spectroscopies. The advantages and limitations of each approach are thoroughly examined.

Thermal gravimetric analysis of in-situ crosslinked nanocellulose whiskers • poly(methyl vinyl ether-co-maleic acid) • polyethylene glycol

TAPPI Journal ◽  
2011 ◽  
Vol 10 (4) ◽  
pp. 29-33
Author(s):  
LEE A. GOETZ ◽  
AJI P. MATHEW ◽  
KRISTIINA OKSMAN ◽  
ARTHUR J. RAGAUSKAS
Keyword(s):  
Thermal Stability ◽  
Polyethylene Glycol ◽  
Vinyl Ether ◽  
Thermal Gravimetric Analysis ◽  
Maleic Acid ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Methyl Vinyl ◽  
Methyl Vinyl Ether

The thermal stability and decomposition of in-situ crosslinked nanocellulose whiskers – poly(methyl vinyl ether-co-maleic acid) – polyethylene glycol formulations (PMVEMA-PEG), (25%, 50%, and 75% whiskers) – were investigated using thermal gravimetric analysis (TGA) methods. The thermal degradation behavior of the films varied according to the percent cellulose whiskers in each formulation. The presence of cellulose whiskers increased the thermal stability of the PMVEMA-PEG matrix.

Advances in the Initiation System and Synthesis Methods of Cationic Poly-acrylamide: A Review

2016 ◽  
Vol 13 (2) ◽  
pp. 109-117 ◽  
Author(s):  
Chuanliang Zhao ◽  
Huaili Zheng ◽  
Yuxin Zhang ◽  
Jinsong Guo ◽  
Yongjun Sun ◽  
...  
Keyword(s):  
Synthesis Methods ◽  
Initiation System ◽  
Poly Acrylamide

Low-cost synthesis of high-performance polycarboxylic ether by Co2+-, Ni2+- and Zn2+-catalyzed H2O2-NaHSO3 initiation system

2021 ◽  
Author(s):  
Heng Tong Zhang ◽  
Quan Xiang Feng ◽  
Cai Lin Liu ◽  
Xian Yan Ren ◽  
Hai Jun Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Initiation System

scholarly journals Gas separation performance of copolymers of perfluoro(butenyl vinyl ether) and perfluoro(2,2-dimethyl-1,3-dioxole)

2021 ◽  
pp. 119401
Author(s):  
Moataz Ali El-Okazy ◽  
Liang Liu ◽  
Christopher P. Junk ◽  
Erich Kathmann ◽  
Whitney White ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Gas Separation ◽  
Separation Performance ◽  
Gas Separation Performance
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