Study on Environmental Stress Cracking of PC Lamp Shade
The environmental stress cracking performance of several commonly used polycarbonate (PC)materials for headlights was tested using the method specified in ISO 4599,and the critical stress cracking values of PC under different solvents were obtained. The article discusses the effects of molecular weight and solvent on the environmental stress cracking of PC.The experimental results show that the higher the molecular weight,the better the resistance of PC materials to environmental stress cracking.The closer the solubility parameter of the solvent is to the solubility of PC,the more likely it is to cause cracking in PC materials.
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