Semi-interpenetrating polymer networks prepared from in situ cationic polymerization of bio-based tung oil with biodegradable polycaprolactone

RSC Advances ◽  
2014 ◽  
Vol 4 (13) ◽  
pp. 6710 ◽  
Author(s):  
Samy A. Madbouly ◽  
Kunwei Liu ◽  
Ying Xia ◽  
Michael R. Kessler
Keyword(s):  
Cationic Polymerization ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Tung Oil

Semi-Interpenetrating Networks of Sulfur-Containing Bismaleimides

1993 ◽  
Vol 5 (4) ◽  
pp. 297-305 ◽  
Author(s):  
F P Glatz ◽  
R Mdiilhaupt
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Acid Anhydride ◽  
Resin System ◽  
Tetracarboxylic Acid ◽  
Interpenetrating Networks ◽  
Sulfur Containing ◽  
Phenylene Sulfide

Microphase-separated semi-interpenetrating polymer networks (semi-n Ns) were obtained by curing 4,4'-bismaleimidodiphenylmethane (BMII), which was advanced in situ with diamine-terminated oligo(phenylene sulfide) (PPS-DA), in the presence of a non-crosslinked linear high-T, aromatic polyether. Poly(thioether amide imide) (PTEAI) containing two phenylene sulfide units, Ultems 1000 poly(ether imide) (PEI) and benzophenone tetracarboxylic acid anhydride/diaminophenylindane polyimnide XU 218$ (PI) were used as non-crosslinked modifiers for the sulfur-containing BMI/PPS-DA resin system, which formed the continuous polymer matrix. Morphological and mechanical properties of the polyether-modified BMI/PPS-DA resin systems were investigated as a function of semi-n?,-compositions and polymer compatibilities. The soluble high-TA P1 gave improved strength and toughness without sacrificing the high T, of the resulting multiphase semi-iPNS.

scholarly journals Obtención de materiales híbridos homogéneos de tipo Orgánico/Inorgánico

2019 ◽  
pp. 14-19
Author(s):  
Virginia Ramírez-Salas ◽  
Beatriz Eugenia Moreno-Martínez ◽  
Erika Alarcón-Ruiz ◽  
Luis Daniel Ordoñez-Pacheco
Keyword(s):  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Coupling Agents ◽  
Propyl Methacrylate ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Optically Transparent ◽  
System Coupling ◽  
Binary Networks ◽  
Inorganic Network

Tridimensional polymers are mutually incompatible and a solution is the formation of interpenetrating polymer networks (IPN’s). In order to obtain optically transparent plaques, the polyurethane (PU), polymethylmetacrylate (PMMA) and sílica (SiO2) were syntetized and we obtained the best conditions of reaction for each material. We sintetized the binary networks and the ternary ones with different percentage from sílica were obtained, incorporating to the system 10% in weight of sílica, carrying out a curing in situ in mass. The interest of this work lies in the association of an inorganic network (SiO2) to two organic networks PU and PMMA. In order to reduce the phase separation that occurs in the PU, PMMA and SiO2 system, coupling agents of organic/inorganic nature were introduced. Optically transparent plaques were obtained using trimethoxysilyl propyl methacrylate and isocyanatopropyl triethoxy silane. The materials were characterized by Fourier Transformed Infrared Spectroscopy, verifying the presence of representative functional groups in each of the samples. The purpose of incorporating these materials to a single network is the improvement of the mechanical, optical and thermal properties of the organic polymers.

In situ calcium phosphate deposition in hydrogels of poly(acrylic acid)–polyacrylamide interpenetrating polymer networks

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16274-16284 ◽  
Author(s):  
M. S. Simeonov ◽  
A. A. Apostolov ◽  
E. D. Vassileva
Keyword(s):  
Calcium Phosphate ◽  
Acrylic Acid ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Interpenetrating Networks ◽  
Naturally Occurring ◽  
First Time ◽  
Poly Acrylic Acid

Interpenetrating networks of poly(acrylic acid) and polyacrylamide were used for the first time as templates for in situ calcium phosphate (CP) deposition in an attempt to mimic the naturally occurring biomineralization.

scholarly journals Thermo-responsive hydrogels based on poly(N-isopropyl-acrylamide) and hyaluronic acid cross-linked with nanoclays

2020 ◽  
Vol 85 (9) ◽  
pp. 1197-1221 ◽  
Author(s):  
Ilinka Mirkovic ◽  
Marija Nikolic ◽  
Sanja Ostojic ◽  
Jelena Maletaskic ◽  
Zoran Petrovic ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Water Soluble ◽  
Nanocomposite Hydrogels ◽  
Dsc Measurements ◽  
Isopropyl Acrylamide ◽  
Hydrogel Network ◽  
Responsive Hydrogels

Semi-interpenetrating polymer networks (SIPN) based on thermoresponsive poly(N-isopropylacrylamide) (PNIPA) and water-soluble sodium salts of linear hyaluronic acid (Na-HA) were physically cross-linked with synthetic nanoclay (laponite XLG). PNIPA hydrogels with different cross-linking densities and Na-HA concentrations were synthesized by in situ free-radical redox polymerization. The structure and heterogeneity of the semi-IPN hydrogels were examined by SEM and XRD. The content of clay incorporated in the gel was determined by TGA. DSC measurements showed that volume phase transition temperature and its enthalpy varied with the clay and hyaluronic acid content. SIPN hydrogels containing negatively charged polyelectrolyte, Na- HA, exhibited higher Qe and faster deswelling rates than the corresponding PNIPA NC hydrogels. The presence of the anionic Na-HA polymer reduced the storage modulus, indicating a weakening of the hydrogel network structure, especially at lower clay contents. The nanocomposite hydrogels exhibited high tan ? values, which increased with increasing Na-HA content.

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