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Int. J. Electroactive Mater. 7 (2019) 67-70

Comparison on Physical Properties Between Polyether-Based and Castor-Based Polyurethane Grouting Materials

NUR IZZAH ATIRAH MAT HUSSAIN1*, Noor Najmi Bonnia2, Radin Siti Fazlina Nazrah Hirzin3, Ernie Suzana Ali4

2Materials Science and Technology, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
3Polymer Science and Technology, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
4Applied Physic, Universiti Sains Islam Malaysia, Nilai, Negeri Sembilan, Malaysia

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Abstract : Polyurethane grouting is an excellent maintenance technology for many infrastructures. Most of commercialized polyurethane grouts (PUG) are polyether-based which are expensive and hazardous. Therefore, in this study, two types of PU which were polyether PUG (petrochemical-based) and castor- based PUG (natural-based) were fabricated to compare their foam reaction time and apparent density. Ratio of isocyanate to polyol (NCO:OH) were varied in four compositions. The rise time of both type of PUG decreased with increasing NCO:OH ratio whereas opposite trend was obtained for tack free time of both PUG. The apparent density of both types of PUG increased with increasing NCO:OH ratio. Overall, CPUG composites had a longer foam reaction time and higher apparent density compared to PPUG composites where the results obtained were in the range of industrial grout properties (cream time: 1-5s, rise time: 90- 365s, tack free time: 120-510s, apparent density: 100-300kg/m3).

Keywords : Polyether-based PUG,Castor-based PUG,NCO:OH ratio,Foam reaction tim