Contents - Akademi Sains Malaysia

Z. Ahmad et alStorage modulus (Pa)1.210 101.010 108.010 96.010 94.010 92.010 90.0Control20C75RH20C95RH0 20 40 60 80 100 120 140 160Temperature (ºC)Loss modulus (Pa)1.410 91.210 91.010 98.010 86.010 84.010 82.010 80.0Control20C75RH20C95RH–50 0 50 100 150Temperature (ºC)Tan delta1.81.61.41.21.00.80.60.40.20.0–0.20(a)(b)Control 1.6Control20C75RH20C95RH1.420C75RH1.810 102.510 9 20C95RH1.2Control1.610 10Control20C75RH1.01.410 1020C75RH 2.010 920C95RH0.820C95RH1.210 101.010 100.60.41.510 98.010 90.21.010 96.010 90.04.010 95.010 82.010 9–0.2–50 0 50 100 1500 20 40 60 80 100 120 140 160 1800.00.0Temperature (ºC)Temperature (ºC)0 20 40 60 80 100 120 140 160 180 200–20 0 20 40 60 80 100 120140 160180 200Temperature (ºC)(c)Temperature (ºC)Storage modulus (Pa)Tan delta1.8Figure 11. Graph of Albipox: (a) Storage modulus versus temperature;(b) Loss modulus versus temperature and (c) Tan d versus temperature for control samples andsamples exposed to 20°C/75%RH and 20°C/95%RH.Loss modulus (Pa)Tan delta1.21.00.80.60.40.20.0–20 0ControlControl 1.220C75RH20C75RH20C95RHvalues reduces with 20C95RH 1.0increase in the water content and the soaked in water at room temperature and placed in theT g shift to lower temperature then 0.8 it is often attributed to plasticization effect of water but it should also be pointed out that it could be related to the ordinary 0.6 sorption of water in the free volume of the network that is, unbound water 0.4(Noguira et al. presents noise (Figure13c) at higher 0.2temperatures and this glass transition temperature of the standard adhesive.may be because the adhesive shrink after the moisture has 0.0dried out at high temperature. T g 20 0 20 40 60 80 100 120140 160180 200 –20 0 20 40 60 80 100The 120 140160 same trend 180 200 was also observed for Timberset. The Temperature (ºC)Temperature (ºC)GENERAL DISCUSSIONinterlaminar shear strengths and toughness (Ahmad et al.Tables 2 and 3 summarizes the thermal analysis results for all Tan delta49