Dispersion Polymerization of Methyl Acrylate in Nonpolar Solvent Stabilized by Block Copolymers Formed In situ via the RAFT Process

2010 ◽  
Vol 2 (2) ◽  
pp. 434-442 ◽  
Author(s):  
Lisa Houillot ◽  
Chuong Bui ◽  
Céline Farcet ◽  
Claudine Moire ◽  
Jacques-Antoine Raust ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Methyl Acrylate ◽  
Dispersion Polymerization ◽  
Nonpolar Solvent

Aqueous Dispersion Polymerization: A New Paradigm for in Situ Block Copolymer Self-Assembly in Concentrated Solution

2011 ◽  
Vol 133 (39) ◽  
pp. 15707-15713 ◽  
Author(s):  
Shinji Sugihara ◽  
Adam Blanazs ◽  
Steven P. Armes ◽  
Anthony J. Ryan ◽  
Andrew L. Lewis
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Aqueous Dispersion ◽  
New Paradigm ◽  
Concentrated Solution

Dispersion Polymerization of Methyl Methacrylate in Supercritical CO2: A Preliminary Evaluation of In Situ Incorporation of Copaiba Oil

2020 ◽  
Vol 59 (20) ◽  
pp. 9398-9407
Author(s):  
T. M. M. Santos ◽  
B. B. Chaves ◽  
J. S. Cerqueira ◽  
M. M. Canario ◽  
D. Bresolin ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Supercritical Co2 ◽  
Dispersion Polymerization ◽  
Preliminary Evaluation ◽  
Copaiba Oil

scholarly journals Porous Ultra-Thin Films from Photocleavable Block Copolymers: In-Situ Degradation Kinetics Study of Pore Material

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 781 ◽  
Author(s):  
Sedakat Altinpinar ◽  
Wael Ali ◽  
Patrick Schuchardt ◽  
Pinar Yildiz ◽  
Hui Zhao ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Polymer Film ◽  
Uv Exposure ◽  
Significant Information ◽  
X Ray ◽  
Washing Process

On the basis of the major application for block copolymers to use them as separation membranes, lithographic mask, and as templates, the preparation of highly oriented nanoporous thin films requires the selective removal of the minor phase from the pores. In the scope of this study, thin film of polystyrene-block-poly(ethylene oxide) block copolymer with a photocleavable junction groups based on ortho-nitrobenzylester (ONB) (PS-hν-PEO) was papered via the spin coating technique followed by solvent annealing to obtain highly-ordered cylindrical domains. The polymer blocks are cleaved by means of a mild UV exposure and then the pore material is washed out of the polymer film by ultra-pure water resulting in arrays of nanoporous thin films to remove one block. The removal of the PEO materials from the pores was proven using the grazing-incidence small-angle X-ray scattering (GISAXS) technique. The treatment of the polymer film during the washing process was observed in real time after two different UV exposure time (1 and 4 h) in order to draw conclusions regarding the dynamics of the removal process. In-situ X-ray reflectivity measurements provide statistically significant information about the change in the layer thickness as well as the roughness and electron density of the polymer film during pore formation. 4 H UV exposure was found to be more efficient for PEO cleavage. By in-situ SFM measurements, the structure of the ultra-thin block copolymer films was also analysed and, thus, the kinetics of the washing process was elaborated. The results from both measurements confirmed that the washing procedure induces irreversible change in morphology to the surface of the thin film.

Thermally stable polyimide nanocomposite films from electrospun BaTiO3 fibers for high-density energy storage capacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44749-44755 ◽  
Author(s):  
Yun-Hui Wu ◽  
Jun-Wei Zha ◽  
Zhi-Qiang Yao ◽  
Fang Sun ◽  
Robert K. Y. Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Dispersion Polymerization ◽  
Composite Films ◽  
High Density ◽  
Nanocomposite Films ◽  
Thermally Stable ◽  
Polyimide Nanocomposite ◽  
Polymerization Method

PI composite films with electrospun BT fibers were fabricated using the in situ dispersion polymerization method. The microstructures, thermal and dielectric properties of the BT fibers and composite films were investigated.

Novel phenylacetylene based ketonic resins

2015 ◽  
Vol 44 (4) ◽  
pp. 198-204 ◽  
Author(s):  
N. Kizilcan ◽  
B. Erson
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Technical Information ◽  
Fluorescence Properties ◽  
Formaldehyde Resin ◽  
Step Method ◽  
Content Type ◽  
Naoh Solution ◽  
Copolymer Structure

Purpose – This paper aims to report the synthesis of resins having fluorescence properties, with the help of phenylacetylene (PhAc) by one-step method of in situ modification of ketonic resin. Cyclohexanone-formaldehyde resin (CFR) and acetophenone formaldehyde resin (AFR) were in situ modified with PhAc, in presence of sodium hydroxide (NaOH) by condensation polymerisation. Design/methodology/approach – Ketone, formalin and phenylacetylene were mixed and then 20% aqueous NaOH solution was added to produce the phenylacethylene modified ketonic resin. The solubility, molecular weight and thermal properties of the products were investigated. Findings – These new PhAc-modified ketonic resins (PAc-CFR and PAc-AFR) have fluorescence properties. Research limitations/implications – This study focuses on obtaining a fluorescence resin using a cyclohexanone, acetophenone and PhAc monomer which is an insulator. Practical implications – This study provides technical information for the synthesis of fluorescence comonomers. The modified resins contain acetylene groups. A chemical redox or radical system can be used to polymerise these acetylene groups and resins with much higher molecular weight. The resins may also promote the adhesive strength of a coating and corrosion inhibition to metal surfaces of a coating. Social implications – The resins will be used for the preparation of AB- and ABA-type block copolymers. These block copolymers may exhibit different properties due to incorporation of monomer into the block copolymer structure. Originality/value – PAc-CFR and PAc-AFR have been synthesised in the presence of a basic catalyst. Higher solubility and fluorescence intensity of the modified ketonic resins may increase their applications in the field of electroactive polymers and open new areas. These comonomers have fluorescence property.

Structure and stability of thin polyaniline films deposited in situ on silicon and gold during precipitation and dispersion polymerization of aniline hydrochloride

2011 ◽  
Vol 519 (18) ◽  
pp. 5933-5941 ◽  
Author(s):  
Zuzana Rozlívková ◽  
Miroslava Trchová ◽  
Ivana Šeděnková ◽  
Milena Špírková ◽  
Jaroslav Stejskal
Keyword(s):  
Dispersion Polymerization ◽  
Aniline Hydrochloride ◽  
Structure And Stability ◽  
Polyaniline Films
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