![]() ![]() ![]() Examining the viscosity curves shown in Fig. ![]() The temperature at the minimum viscosity was also significantly higher. The low-flow system (batch 1) gelled at a lower temperature than the control (batch 2), while the high-flow system (batch 4) gelled at a much higher temperature. The gel temperature also showed the effect of varying the catalyst content. For example, the minimum viscosity for the high-flow material (batch 4) was much lower than that of the low-flow material (batch 1). The rest of the viscosity data further emphasize the effect of the BF 3 catalyst. The low flow system (batch 1) exhibited a flow number of approximately one-half that of the normal-flow material (batch 2) and an order of magnitude less than that of the high-flow system (batch 4). The dramatic effect of the BF 3 catalyst was again evident. Neat Resin Dynamic Viscosity Test Results (1 ☌/min) Batch Number The test results for the viscosity tests at a heating rate of 1 ☌ min −1 are summarized in Table. Flow is the reciprocal of viscosity when integrated as a function of time between the starting time ( t 0) and the time to gellation ( t gel). Campbell, in Manufacturing Processes for Advanced Composites, 2004 7.4 Rheological Propertiesĭynamic viscosity measurements were performed at 1, 2 and 5 ☌ min −1 on each batch of neat resin using RDS 7700. The Effect of Chemical Composition and Processing on Carbon/Epoxy Laminate Quality: A Combination of Effectsį.C. Kinematic Viscosity is the ratio of absolute or dynamic viscosity to density - a quantity in which the force is external and independent of the mass of the fluid. A fluid with less viscosity will take less time to flow than a fluid with higher viscosity). The higher the viscosity, the longer it takes to flow through the tube (i.e. ![]()
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