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.

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 Spectroscopic and thermogravimetric studies of homogeneous materials from PU/PMMA/SiO2

2020 ◽  
pp. 18-23
Author(s):  
Virginia Ramírez-Salas ◽  
Luis Daniel Ordoñez-Pacheco ◽  
Erika Alarcon-Ruiz ◽  
Beatriz Eugenia Moreno-Martínez
Keyword(s):  
Thermal Stability ◽  
Bulk Polymerization ◽  
The Other ◽  
Hybrid Networks ◽  
Coupling Agents ◽  
Propyl Methacrylate ◽  
Polymeric Networks ◽  
Ftir Studies ◽  
Optically Transparent ◽  
Thermogravimetric Studies

Polymers of organic-inorganic origin are incompatible by nature and a proposal to solve this behavior is the formation of Interpenetrated Polymeric Networks (IPN) using coupling agents. Coupling agents make it possible to create a crosslinking between the phases present that provides better mechanical, optical and thermal properties. These materials are known as Hybrid Networks. To obtain optically transparent materials, individual networks of Polyurethane (PU), Methyl Polyacrylate (PMMA) and Silica (SiO2) were used. Binary and ternary networks were synthesized using bulk polymerization incorporating SiO2 up to 10% by weight. In this research, coupling agents such as Trimethoxysilyl Propyl Methacrylate (MSMA) and Isocyanotopropyl Triethoxy Silane (IPTS) were introduced to the ternary networks in order to reduce the phase separation that occurs in these systems. Fourier Transform Infrared Spectroscopy (FTIR) studies demonstrated the presence of functional groups of binary and ternary networks. On the other hand, the thermogravimetric tests (TGA) carried out on hybrid IPN´s with coupling agents, presented greater thermal stability and better optical properties, providing the new IPN´s with the opportunity to have promising applications.

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.

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