The structural properties of extruded cast films of poly-3-hydroxybutyrate (P3HB) and poly-3-hydroxybutyrate-co-3-hydroxyvalerate (P3HB-co-3HV) were analysed by Raman spectroscopy. A sensitive band for the side chain of the 3HV was found at 844 cm⁻¹ (νCC, νC-COO). Using an internal standard at 1101 cm⁻¹ (ν_sC-O-C, ρCH₃), a model for calculation of the 3HV content was developed. This was based on analysis of samples with a 3HV content of 0–12 mol%. Additionally, P3HB-co-3HV samples were tempered in order to create different degrees of crystallinity. The induced changes in the Raman spectra were analysed. The Raman model to determine the degree of crystallinity considers the sensitive band at 2999 cm⁻¹ (ν_asCH₂) and the internal standard at 1059 cm⁻¹ (νC-O, νC-CH₃, ρCH₂). The investigated crystallinity was in a range of 0.69–0.86.

用拉曼光谱法分析了聚-3-羟基丁酸酯（P3HB）和聚-3-羟基丁酸酯-co-3-羟基戊酸酯（P3HB-co-3HV）的挤出流延膜的结构性能。在844 cm ^-1（νCC，νC-COO）处发现了3HV侧链的敏感带。在1101厘米使用内标^-1（ν_小号C-OC，ρCH ₃），对于3HV的含量的计算的模型的开发。这是基于对3HV含量为0–12 mol％的样品的分析。此外，对P3HB-co-3HV样品进行回火以产生不同程度的结晶度。分析了拉曼光谱的诱发变化。确定结晶度的拉曼模型考虑了2999 cm ^-1（ν_作为CH ₂），并在1059厘米内标^-1（νC-O，νC-CH ₃，ρCH ₂）。研究的结晶度在0.69–0.86范围内。