Shinzawa Hideyuki, Itasaka Hiroki
Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan; Innovative Functional Materials Research Institute, AIST, Nagoya, Japan.
Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan; Innovative Functional Materials Research Institute, AIST, Nagoya, Japan.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 May 15;273:121056. doi: 10.1016/j.saa.2022.121056. Epub 2022 Feb 17.
Disrelation mapping was applied to Raman imaging data for the first time to investigate submolecular-level variations that occurred at the interface between glass fiber (GF) and polypropylene (PP). Disrelation maps constructed with Raman spectra provided spatial as well as spectral information, which are not readily accessible from hypercubic data. For example, patterns that appeared in the disrelation maps showed the predominant development of a long helix band (1002 cm) at the interface between the GF and PP, rather than a short helix band (974 cm). The development of the disrelation intensity was observed inside the sample as well as at the surface. These results clearly reveal that the GF or compatibilizer works intrinsically as a nucleating agent to induce additional development of the crystalline structure of the PP, which eventually makes the polymer system harder but more brittle.
首次将非关联映射应用于拉曼成像数据，以研究玻璃纤维（GF）与聚丙烯（PP）界面处发生的亚分子水平变化。用拉曼光谱构建的非关联图谱提供了空间和光谱信息，这些信息从超立方数据中不易获得。例如，非关联图谱中出现的模式表明，在GF和PP的界面处，长螺旋带（1002 cm）而非短螺旋带（974 cm）占主导地位。在样品内部和表面都观察到了非关联强度的变化。这些结果清楚地表明，GF或增容剂本质上作为成核剂起作用，诱导PP晶体结构的额外发展，最终使聚合物体系更硬但更脆。
