Contents - Akademi Sains Malaysia

Z. Ahmad et alStorage modulus (Pa)1.810 101.610 101.410 101.210 101.010 108.010 96.010 94.010 92.010 90.0Control20C95RH30C95RH50C95RHLoss modulus (Pa)2.510 92.010 91.510 91.010 95.010 80.0Control20C95RH30C95RH50C95RHTan delta1.00.80.60.40.20.00 20 40 60 80 100 120 140 160180 200Temperature (ºC)0 20 40 60 80 100 120 140 160 180 200Temperature (ºC)0(a)(b)Storage modulus (Pa)1.210 101.010 108.010 96.010 94.010 92.010 9Control20C95RH30C95RH50C95RHTan delta1.00.80.60.40.20.0Control20C75RH20C95RH1.210 91.010 98.010 86.010 84.010 82.010 80.00 20 40 60 80 100 120 140 160 180 2000 20 40 60 80 100 120 0.0140 160 180 200Temperature (ºC) 0 20 40 60 80 100 120 140Temperature (ºC)0 20 40 60 80 100 120 140Temperature (ºC)(c)Temperature (ºC)Loss modulus (Pa)Control20C95RH30C95RH50C95RHControl20C75RH20C95RHTan delta1.81.61.41.21.00.80.60.40.20.0–0.20 20Figure 9. Graph of Timberset: (a) Storage modulus versus temperature;(b) Loss modulus versus temperature and (c) tan d versus temperature for control specimens andspecimens aged at 20°C/95%RH, 30°C/95%RH and 50°C/95%RH for 90 days.Control 1.8Control20C75RH1.620C75RH20C95RH20C95RHageing where Timberset curves are 1.4 to right of Albipox and of dynamic mechanical analysis present similar behaviour1.2curves shifted to much higher temperatures. 1.0 This showsthat depend on the polymeric matrix and the moisturethat Timberset has the highest glass 0.8transition temperature 0.6shifted to lower temperature but Albipox and Timberset0.4 shifted to higher temperature. 0.2 T g 0.0From Figure 14a it can be seen that the T g –0.2T g for Albipox increased by20 40 60 80 100 120 1400 20 40 60 80 100 120 140 160 180 200Temperature Thermal (ºC) Properties of Adhesives after Soaked Temperature in to (ºC) control specimens. It has been pointed out by JohncockWater at Room TemperatureT gas a result of water induced additional cure of incompletely Albipox and Timberset after soaked in water. The curvescure characteristic of the adhesives. Figure 14c shows thatTan delta47