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胺类试剂曾经作为PET的一种刻蚀剂以显示材料的微结构。本文所述工作把PET-甲胺归结为化学应力开裂系统。含量为30％的甲胺水溶液作为试剂,用SEM观察了不同力学和热处理历史以及不同受力状态下PET纤维的化学应力裂缝和断裂面形态,用GPC测定PET长链分子甲胺作用下链长的变化,利用精巧的纤维剥皮技术研究渗透性对应力开裂的影响,提出用高聚物断裂力学的微观机理来解释化学应力开裂过程。认为材料加工过程
Amine reagents used as an etchant for PET to show the microstructure of the material. The work described in this article attributes PET-methylamine to a chemical stress cracking system. Methylamine aqueous solution containing 30% methylamine as a reagent, the chemical stress cracks and the fracture surface morphology of PET fibers under different mechanical and thermal history and different stress state were observed by SEM, and the chain length of PET long chain methylamine was measured by GPC The exquisite fiber stripping technology is used to study the influence of permeability on stress cracking. The microcosmic mechanism of polymer fracture mechanics is proposed to explain the chemical stress cracking process. Think material processing