مشخصات پژوهش

The production of cellular polymer foams has been well-known recently because of their various applications like thermal insulation, furniture and automotive industry [1]. In this study the amourphous polymers with two different blowing agents (CO2 and n-pentane) were foamed via the batch foaming system. The system contains a high-pressure stainless steel vessel, pressure gauge and temperature controller. The thermodynamic instability in polymer/gas system could be provided through a rapid pressure release or temperature increment. The effect of different foaming conditions, like temperature and pressure on the foaming process, were investigated. The morphological study was investigated for samples by using the scanning electron microscopy (SEM) [1-2]. The cell density was decreased with increasing of the temperature and increased by the pressure in foams, respectively. The results also show that the temperature, and using two blowing agents, could control the final cellular structures of polymer.