Supramolecular step-growth polymerization kinetics of pre-assembled triblock copolymer micelles

2019 ◽  
Vol 10 (25) ◽  
pp. 3461-3468 ◽  
Author(s):  
Yingqing Lu ◽  
Liang Gao ◽  
Jiaping Lin ◽  
Liquan Wang ◽  
Liangshun Zhang ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Polymerization Kinetics ◽  
Structural Defects ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Copolymer Micelles ◽  
Kinetics Of

Pre-assembled copolymer micelles were found to “polymerize” into hierarchical nanowires, induced by the structural defects on the micelle surfaces.

Polymerization-like kinetics of the self-assembly of colloidal nanoparticles into supracolloidal polymers

Nanoscale ◽  
2018 ◽  
Vol 10 (35) ◽  
pp. 16873-16880 ◽  
Author(s):  
Xiaodong Ma ◽  
Yaru Zhou ◽  
Liangshun Zhang ◽  
Jiaping Lin ◽  
Xiaohui Tian
Keyword(s):  
Self Assembly ◽  
Rate Coefficient ◽  
Polymerization Kinetics ◽  
Colloidal Nanoparticles ◽  
Variable Rate ◽  
Molecular Systems ◽  
Diffusion Controlled ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of

Unlike the polymerization kinetics of molecular systems, the growth of supracolloidal polymers obeys diffusion-controlled step-growth polymerization kinetics with a variable rate coefficient.

Direct insight into the kinetics of the high-pressure step-growth polymerization of DGEBA/aniline model system

Polymer ◽  
2019 ◽  
Vol 172 ◽  
pp. 322-329 ◽  
Author(s):  
Andrzej Dzienia ◽  
Kajetan Koperwas ◽  
Magdalena Tarnacka ◽  
Mirosław Chorążewski ◽  
Eugene B. Postnikov ◽  
...  
Keyword(s):  
High Pressure ◽  
Model System ◽  
Pressure Step ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of ◽  
Insight Into

Network Formation Kinetics of Poly(dimethylsiloxane) Based on Step-Growth Polymerization

2021 ◽  
Vol 54 (17) ◽  
pp. 7678-7689 ◽  
Author(s):  
Jie Jin ◽  
Ru-Qiu Zheng ◽  
Yin-Ning Zhou ◽  
Zheng-Hong Luo
Keyword(s):  
Network Formation ◽  
Formation Kinetics ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of

DSC investigations on the kinetics of the linear step growth polymerization of dian-bisglycidylether with amines

1985 ◽  
Vol 92 ◽  
pp. 185-188 ◽  
Author(s):  
H.J. Flammersheim ◽  
H. Hörhold ◽  
K. Bellstedt ◽  
J. Klee
Keyword(s):  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of

Research on the Reaction of IPDI and PPG with Organo-Tin Mixed Catalyst

2012 ◽  
Vol 430-432 ◽  
pp. 399-403
Author(s):  
Yuan Wei ◽  
Shu Lin An ◽  
Su Ran Liao
Keyword(s):  
Activation Energy ◽  
Molecular Weight ◽  
Order Equation ◽  
Polypropylene Glycol ◽  
Step Process ◽  
Mixed Catalyst ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of ◽  
Polymerization Conditions

The kinetics of the reaction is essential for the synthesis of polyurethane. In this study, the reaction kinetics and polymerization conditions in two-step process of isophorone diisocyante (IPDI) and polypropylene glycol (PPG) with organo-tin mixed catalyst were investigated by chemical titration. The results showed that the reaction obeyed the second-order equation of step-growth polymerization, the rate constants of IPDI and PPG reaction at 50, 60 and 70°C were 0.0161, 0.0373 and 0.0806 kg•mol-1•min-1，respectively. The activation energy obtained from the result was 74.25 kJ•mol-1. The polyurethane with number molecular weight 38721 was synthesized and was characterized by Fourier transform infrared (FTIR).

scholarly journals Tunable Photonic Materials via Monitoring Step‐Growth Polymerization Kinetics by Structural Colors

2019 ◽  
Vol 30 (7) ◽  
pp. 1906833 ◽  
Author(s):  
Ellen P. A. Heeswijk ◽  
Lanti Yang ◽  
Nadia Grossiord ◽  
Albertus P. H. J. Schenning
Keyword(s):  
Polymerization Kinetics ◽  
Photonic Materials ◽  
Structural Colors ◽  
Step Growth ◽  
Step Growth Polymerization

Kinetics of the step-growth polymerization of epoxide in the presence of the linear polyurethane. Effect of the phase separation of components

1997 ◽  
Vol 33 (2-3) ◽  
pp. 351-357 ◽  
Author(s):  
Elzbieta Y. Horichko ◽  
Anatoly M. Kuksin ◽  
Vitaly V. Horichko ◽  
Anatoly E. Nesterov ◽  
Valery V. Muzhev ◽  
...  
Keyword(s):  
Phase Separation ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Kinetics Of ◽  
Separation Of Components

The mechanism of the anionic coordination polymerization of isoprene

1980 ◽  
Vol 45 (9) ◽  
pp. 2391-2399 ◽  
Author(s):  
Miroslav Kašpar ◽  
Jiří Trekoval
Keyword(s):  
Chromatographic Method ◽  
Initial Period ◽  
Reaction Scheme ◽  
Polymerization Kinetics ◽  
Coordination Polymerization ◽  
Initial Concentration ◽  
The Cross ◽  
Gas Chromatographic Method ◽  
Kinetics Of

The polymerization kinetics of isoprene (2-methyl-1,3-butadiene) in benzene with butyllithium as the initiator was investigated by the gas chromatographic method. After completion of the initial period of the reaction, its order with respect to the initial concentration of initiator is negative at the concentrations of the latter between 0.01 and 0.25 mol/l, and positive at higher concentrations. A reaction scheme has been suggested with respect to the "cross" association of butyllithium and of the "living" oligoisoprene.

The effect of electrondonors on the polymerization kinetics of isoprene

1980 ◽  
Vol 45 (12) ◽  
pp. 3338-3346
Author(s):  
Miroslav Kašpar ◽  
Jiří Trekoval
Keyword(s):  
Induction Period ◽  
Ethyl Ether ◽  
Reaction Order ◽  
Propagation Rate ◽  
Reaction Scheme ◽  
Polymerization Kinetics ◽  
Polymerization Rate ◽  
Constant Concentration ◽  
Initial Concentration ◽  
Kinetics Of

The effect of small additions of 1-octene, butyl ethyl ether and triethylamine on the polymerization kinetics of isoprene (2-methyl-1,3-butadiene) in benzene initiated with butyllithium was investigated by employing the GLC analysis. The addition of 1-octane was reflected only in a shorter induction period of the reaction; the effect on the propagation rate was insignificant. With the increasing amount of butyl ethyl ether, the polymerization rate increases linearly, while the reaction order with respect to the concentration of triethylamine is variable and increases from 0.33 to 0.66 with the increasing concentration of the initiator. For a constant concentration of triethylamine, the reaction order with respect to the initial concentration of the initiator was found to vary considerably, reaching even negative values. A reaction scheme was suggested, taking into account the competition between two different solvates of alkyllithium.

scholarly journals Synthesis and Polymerization Kinetics of Rigid Tricyanate Ester

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1686
Author(s):  
Andrey Galukhin ◽  
Roman Nosov ◽  
Ilya Nikolaev ◽  
Elena Melnikova ◽  
Daut Islamov ◽  
...  
Keyword(s):  
Kinetic Analysis ◽  
Single Step ◽  
Polymerization Kinetics ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Diffusion Controlled ◽  
Polymerization Product ◽  
The One ◽  
Kinetics Of

A new rigid tricyanate ester consisting of seven conjugated aromatic units is synthesized, and its structure is confirmed by X-ray analysis. This ester undergoes thermally stimulated polymerization in a liquid state. Conventional and temperature-modulated differential scanning calorimetry techniques are employed to study the polymerization kinetics. A transition of polymerization from a kinetic- to a diffusion-controlled regime is detected. Kinetic analysis is performed by combining isoconversional and model-based computations. It demonstrates that polymerization in the kinetically controlled regime of the present monomer can be described as a quasi-single-step, auto-catalytic, process. The diffusion contribution is parameterized by the Fournier model. Kinetic analysis is complemented by characterization of thermal properties of the corresponding polymerization product by means of thermogravimetric and thermomechanical analyses. Overall, the obtained experimental results are consistent with our hypothesis about the relation between the rigidity and functionality of the cyanate ester monomer, on the one hand, and its reactivity and glass transition temperature of the corresponding polymer, on the other hand.

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