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Evi Triwulandari
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SYNTHESIS OF POLYURETHANE MICROCAPSULE USING INTERFACIAL POLYMERIZATION AS SELF HEALING COATING MATERIAL Athanasia Amanda Septevani; Evi Triwulandari; Dewi Sondari
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1939.576 KB) | DOI: 10.14203/widyariset.15.2.2012.265–272

Abstract

Polyurethane microcapsule had been made as self healing coating material. Polyurethane microcapsule synthesis had been conducted by interfacial polymerization both spontaneous polymerization and prepolymer polyurethane polymerization using glycerol as renewable palm oil polyol. Based on FTIR-Spectra showed the functional group of polyurethane formed both spontaneous and prepolymer polyurethane polymerization. Polyurethane microcapsule formed was in spherical form. The particle size prepared by spontaneous polimerization was smaller than particle prepared by prepolymer polymerization at range 20,51±12,7 and 139,2±72,3 μm respectively.
SYNTHESIS OF POLYURETHANE MICROCAPSULE USING INTERFACIAL POLYMERIZATION AS SELF HEALING COATING MATERIAL Athanasia Amanda Septevani; Evi Triwulandari; Dewi Sondari
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.15.2.2012.265–272

Abstract

Polyurethane microcapsule had been made as self healing coating material. Polyurethane microcapsule synthesis had been conducted by interfacial polymerization both spontaneous polymerization and prepolymer polyurethane polymerization using glycerol as renewable palm oil polyol. Based on FTIR-Spectra showed the functional group of polyurethane formed both spontaneous and prepolymer polyurethane polymerization. Polyurethane microcapsule formed was in spherical form. The particle size prepared by spontaneous polimerization was smaller than particle prepared by prepolymer polymerization at range 20,51±12,7 and 139,2±72,3 μm respectively.
PENGARUH SENYAWA SILAN TERHADAP SIFAT MEKANIK MATERIAL PELAPIS PADUAN HIBRID EPOKSI TERMODIFIKASI POLIURETAN Savitri Savitri; Evi Triwulandari; Agus Haryono; O A Syahputra
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (847.129 KB) | DOI: 10.14203/jkti.v17i1.19

Abstract

Preparation of hybrid coating material from modified epoxy polyurethane (ETP) and silan (Si) has been done. Epoxy and polyurethane were modified with silan using γ-Glisidoksil propil trimetoksisilan (GPTMS) and γ-aminopropyl triethoxysilane (γ-APS) and also dibutyltindilaurate (DBTL) as catalyst. Fourier Transform Infrared (FTIR) characterization indicated that the hybrid coating material has been formed. The results of the analysis of NCO percent and conversion rate of isocyanates (α) also verified that the ETP-Si hybrid coatings have been formed. The addition 30% of silane as Si-O group indicated the rest of NCO percent was the lowest for hybrid coating material with polyurethane concentration of 5% and 10. The composition of ETP5% - Si 30% was the optimum composition from the ETP-Si hybrid coating material based on the mechanical analysis.Key words: hybrid coating, polyurethane, epoxy, silane, ETP – Si
PENGARUH 1,4-BUTANDIOL SEBAGAI POLIOL PADA MODIFIKASI EPOKSI MENGGUNAKAN POLIURETAN Muhammad Ghozali; Agus Haryono; Asep Handaya Saputra; Evi Triwulandari
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.708 KB) | DOI: 10.14203/jkti.v17i1.17

Abstract

Corrosion is a natural phenomenon causing degradation value and function of material. The use of paints and polymer coatings is the most popular method to protect material against corrosion. Polymer coatings used was an epoxy-based organic resin and polyurethane. Generally, those coating materials were used separately. This study carried out the modification of epoxy with polyurethane in order to obtain coating materials as a combination of epoxy and polyurethane. Expectedly, the chemical reaction between epoxy coating-material and polyurethane could improve the characteristics of the obtained coating materials. Synthesis of polyurethane-modified epoxy with 1,4-butanediol as the polyol (ETP-BTD) was conducted by reacting epoxy resin, tolonate and 1,4-butanediol simultaneously at 50 oC for 30 min with dibutyltindilaurate as catalyst. Functional group analysis of ETP-BTD was performed by Fourier Transform Infra Red (FTIR), tensile strength by Ultimate Testing Machine (UTM), adhesion by ASTM D4541 Portable Pull-off Adhesion Testers, water vapor transmission rate by ASTM E96 Desiccant Method and thermal stability was studied using Thermogravimetric Analysis (TGA). The FTIR analysis results showed that there are urethane bonds at 1716-1690 cm-1. These results showed that modification of epoxy using polyurethane increased the tensile strength and adhesion, and also decreased the water vapor transmission rate of epoxy. Keywords: epoxy, modification, polyol, polyurethane, 1.4-butanediol
Co-Authors Agus haryono Asep Handaya Saputra Athanasia Amanda Septevani Dewi Sondari Muhammad Ghozali O A Syahputra Savitri Savitri