In this study the stretchability and the suitability for blow molding processes of five grades of PET are assessed within that frame of Time-Temperature Superposition Principle (TTP) where testing conditions is described with one-unique parameter: The equivalent strain-rate at reference temperature. PETs were chosen to exhibit significantly different behaviors representative for part of the variability of behavior that could exist in recycled materials. A route to anticipate stretching conditions of different resins from DMA analysis is then validated that should be extended to account for the expected variabilities in stretchability of recycled materials in an industrial context.

在这项研究中，在时间-温度叠加原理 (TTP) 的框架内评估了五个等级 PET 的拉伸性和吹塑工艺的适用性，其中测试条件用一个唯一参数描述：参考温度下的等效应变率. 选择 PET 以表现出显着不同的行为，代表回收材料中可能存在的部分行为可变性。然后验证了从 DMA 分析中预测不同树脂拉伸条件的方法，该方法应扩展到考虑工业环境中回收材料拉伸性的预期变化。