The microscopic deformation behavior of polyamide (PA) elastomers (PAEs) with various PA contents has been investigated by rheo-Raman spectroscopy. The PAEs with relatively high PA content show a uniaxial molecular orientation and the stretching load is isotropically applied on the crystalline chains, similar to typical semi-crystalline polymers. Conversely, the crystalline chains of the PAEs with relatively low PA content show a biaxial molecular orientation up to the highly strained region. Moreover, the stretching load is anisotropically applied on the crystalline chains located in the equatorial region of the spherulites. The elasticity of the PAEs with relatively low PA content is ascribed to the affine-like deformation of the spherulitic structure owing to the existence of soft interlamellar layers.

通过流变拉曼光谱研究了具有不同PA含量的聚酰胺（PA）弹性体（PAE）的微观变形行为。与典型的半结晶聚合物相似，具有相对较高PA含量的PAE表现出单轴分子取向，且拉伸载荷各向同性地施加在结晶链上。相反，具有相对低的PA含量的PAE的结晶链显示出直至高应变区域的双轴分子取向。而且，拉伸载荷被各向异性地施加到位于球晶赤道区域的结晶链上。具有相对低的PA含量的PAE的弹性归因于由于存在软的层间层而导致的球状结构的仿射样变形。