Cationic Polymerization ofp-Methoxystyrene in Water with Dodecylbenzenesulfonic Acid and Ytterbium Triflate:  Evidence for an Inverse Emulsion Process

2004 ◽  
Vol 37 (9) ◽  
pp. 3214-3221 ◽  
Author(s):  
Séverine Cauvin ◽  
François Ganachaud ◽  
Virginie Touchard ◽  
Patrick Hémery ◽  
Frédéric Leising
Keyword(s):  
Cationic Polymerization ◽  
Dodecylbenzenesulfonic Acid ◽  
Inverse Emulsion ◽  
Ytterbium Triflate ◽  
Emulsion Process

Photoinitiated Cationic Polymerization of Mono and Divinyl Ethers in Aqueous Medium Using Ytterbium Triflate as Lewis Acid

2008 ◽  
Vol 209 (18) ◽  
pp. 1881-1886 ◽  
Author(s):  
Muhammet U. Kahveci ◽  
M. Atilla Tasdelen ◽  
Wayne D. Cook ◽  
Yusuf Yagci
Keyword(s):  
Aqueous Medium ◽  
Lewis Acid ◽  
Cationic Polymerization ◽  
Ytterbium Triflate

Complex inorganic/organic core-shell architectures via an inverse emulsion process

2009 ◽  
Vol 288 (3) ◽  
pp. 333-339 ◽  
Author(s):  
Kathy Schmidtke ◽  
Günter Lieser ◽  
Markus Klapper ◽  
Klaus Müllen
Keyword(s):  
Core Shell ◽  
Inverse Emulsion ◽  
Emulsion Process

Ultrasonic Assisted Dynamic Inverse Emulsion: A Novel Polymerization Technique to Prepare Conductive Polyaniline/Palygorskite Composite

2013 ◽  
Vol 873 ◽  
pp. 507-513
Author(s):  
Zhe Zhang ◽  
Xiao Liang Wang ◽  
Jian Xu ◽  
Heng Chang Ma ◽  
Zi Qiang Lei
Keyword(s):  
Weight Ratio ◽  
Polymerization Process ◽  
Ammonium Bromide ◽  
Dodecylbenzenesulfonic Acid ◽  
Inverse Emulsion ◽  
Electrically Conducting ◽  
Ultrasonic Assisted ◽  
Ft Ir ◽  
Conductive Polyaniline ◽  
Dynamic Inverse

The present work describes an ultrasonic assisted in-situ dynamic inverse emulsion polymerization process of aniline (ANI) in the presence of organic palygorskite (OPGS) in toluene. Core-shell structure of electrically conducting polymerized ANI (PANI) combined with OPGS was prepared by utilizing the method. Dodecylbenzenesulfonic acid (DBSA) was used as the dopant and emulsifier. The OPGS was obtained via the chemical reaction of pretreated palygorskite with hexadecyltrimethyl ammonium bromide (HTAB). The prepared PANI/OPGS composite was characterized by FT-IR, UV-Vis, XRD, TGA and SEM. In addition, the conductivity was evaluated at different ANI/OPGS weight ratio. When the ANI/OPGS weight ratio increased to 2:7, the conductivity of the composite still remained at 10 S/m at room temperature. The results demonstrated that ultrasonic assisted dynamic inverse emulsion would be an excellent polymerization technique to increase the conductivity and the polymerization rate.

Epoxy-titania composites of cationic polymerization: synthesis conditions and properties

2015 ◽  
Vol 37 (4) ◽  
pp. 402-407
Author(s):  
S.V. Zhil’tsova ◽  
◽  
V.M. Mikhal’chuk ◽  
N.G. Leonova ◽  
R.I. Lyga ◽  
...  
Keyword(s):  
Cationic Polymerization ◽  
Synthesis Conditions

scholarly journals Thin shell aerogel fabrication for FIREX-I targets using high viscosity (phloroglucinol carboxylic acid)/formaldehyde solution

2008 ◽  
Vol 26 (3) ◽  
pp. 449-453 ◽  
Author(s):  
H. Yang ◽  
K. Nagai ◽  
M. Nakai ◽  
T. Norimatsu
Keyword(s):  
Carboxylic Acid ◽  
Thin Shell ◽  
Shell Thickness ◽  
High Viscosity ◽  
Formaldehyde Solution ◽  
Resorcinol Formaldehyde ◽  
Foam Structure ◽  
Final Density ◽  
Emulsion Process ◽  
High Level

AbstractCapsules with a thin aerogel shell were prepared by the OO/W/OIemulsion process. (Phloroglucinol carboxylic acid)/formaldehyde (PF) was used as the water phase (W) solution to form the shell of the capsule. PF is a linear polymer prepared from phloroglucinol carboxylic acid. The viscosity of the PF solution can reach a high level of 9×10−5m2/s without gelation while resorcinol/formaldehyde (RF) gelates at ~3–4×10−5m2/s. Using the viscous PF solution, capsule with a 17 µm gel shell was fabricated. This thickness satisfies the specification of the first phase of Fast Ignition Realization Experiment (FIREX-I) at Osaka University. When PF gel was extracted to remove the organic solvent, shrinkage of 9% occurred. The final density of the PF aerogel was 145 mg/cm3. Both the shell thickness and density can satisfy the specification of FIREX-I. The pore size of the PF aerogel was less than 100 nm while that of RF was 200–500 nm. The SEM showed that PF had particle-like foam structure while RF had fibrous-like foam structure.

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