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Effect of surfactant on conductivity of Poly(pyrrole-co-formyl pyrrole) via Emulsion Polymerization |
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| รหัสดีโอไอ | |
| Creator | Sirilak ARUNSAWAD,Kawee SRIKULKIT,Sarintorn LIMPANART |
| Title | Effect of surfactant on conductivity of Poly(pyrrole-co-formyl pyrrole) via Emulsion Polymerization |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2557 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 24 |
| Journal No. | 2 |
| Page no. | 29-34 |
| ISSN | 8576149 |
| Abstract | Poly(pyrrole-co-formyl pyrrole), P(Py-co-FPy), were synthesized via emulsion polymerization usingsodium dodecylsulfate (SDS) and poly(styrenesulfonate) (PSS) as surfactants and trifluoroacetic acid (TFA)as a catalyst. Amounts of surfactant were vary as mole ratio of surfactant:monomer (0.25, 0.5 and 1.0). Thesynthesis copolymers were characterized by FTIR, SEM, particle size analyzer and four point probes. As aresult of FT-IR spectra proved that the synthesized copolymers are associated with the structure of the P(Pyco-FPy). Spherical particles were detected by SEM and particles diameter is in range of 60-600 nmdepending on type and amounts of surfactant. The electrical conductivity is in the range of 1.74x 10-5 to 2.21x 10-3 S/cm. The P(Py-co-FPy) nanoparticles doped with PSS are higher conductivity than doped with PSS.ordered porous silica from tetraethylortosilicate precursor using double polymer as templates. In this study,co-MET technique was conducted by varying template type (namely PEG/acrylamide and 2(acryloyloxy)N,N,Ntrimethylethanaminium chloride/acrylamide) and percentage of polymer (2.5%, 5%, 10%, 15% and 20%for PEG and 0.5%, 1%, 2.5%, 5%, 10% for 2(acryloyloxy)N,N,Ntrimethylethanaminium chloride). Theresulting porous silica were then characterized by SEM-EDS, BET and XRD to investigates the pore characterand structure of silica. Based on SEM-EDS and BET analysis, it is shown that the amount and the type ofpolymer gave a significant effect to the structure formation of the porous silica. Cationic polymer as templatesgave higher surface area and uniform pore size than neutral polymer templates. Polymer concentration of 2.5%gave the best result for both template types, resulting an interconnected mesopore silica with surface area of615 m2/g for PEG and 1137 m2/g for 2(acryloyloxy)N,N,Ntrimethylethanaminium chloride.conventional plasticizer, diisononyl phthalate (DINP) to avoid the plasticizer loss from poly(vinyl chloride)(PVC) overtime for various service conditions and to obtain a long-term plasticizer retention in the flexiblePVC products. The plasticized PVC samples were prepared by melt mixing on a two roll mill, followed bycompression molding. The mechanical properties (tensile properties, tear strength and hardness), thermalstability and morphology of the 20/20 phr (parts by weight per hundred parts of resin) DINP/PBS-plasticizedPVC were evaluated and compared with those of the 40 phr DINP-plasticized PVC. The tensile strength,Young's modulus, tear strength, hardness and thermal stability were found to be improved, while theelongation at break was decreased as a result of the partial replacement of DINP with PBS in the plasticizedPVC. Moreover, the DINP/PBS-plasticized PVC composites filled with varied loadings of CaCO3 (2.5, 5,7.5 and 10 phr) showed an increase in the elongation at break, Young's modulus and thermal stability in adose-dependent manner, while the tensile strength, tear strength and hardness were unaffected by theincreasing amount of CaCO3. The morphology of the composites observed by scanning electron microscopyshowed a number of voids on the fractured surface of the plasticized PVC due to the pulling out CaCO3particles, caused by the low interfacial adhesion between filler and polymer. |
