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Liubimovskii SO, Novikov VS, Sagitova EA, Kuznetsov SM, Bakirov AV, Dmitryakov PV, Sedush NG, Chvalun SN, Ustynyuk LY, Kuzmin VV, Vasimov DD, Moskovskiy MN, Nikolaeva GY. Raman evaluation of the crystallinity degree and composition of poly(L-lactide-co-ε-caprolactone). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 310:123876. [PMID: 38290278 DOI: 10.1016/j.saa.2024.123876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/02/2024] [Accepted: 01/07/2024] [Indexed: 02/01/2024]
Abstract
In this work, we study two series of the copolymers of L-lactide (LLA) and ε-caprolactone (CL) with the CL molar content of 5, 15, and 30 %. The first series was the commercial semicrystalline granules (Corbion, Netherlands), which we analyzed without any additional modification. The second series was amorphous films, prepared from the granules by hot pressing with the subsequent fast quenching in order to avoid the crystallization. We used Raman spectroscopy in conjunction with the quantum chemical modeling to evaluate the structure of the copolymers. As additional methods, we applied X-ray diffraction (XRD) analysis and differential scanning calorimetry (DSC). The main result of our study is the elaboration of the Raman methods of quantitative analysis of the relative contents of the comonomers and the crystallinity degree of the poly(L-lactide-co-ε-caprolactone). These methods are based on measurements of the ratios of the peak intensities of the poly(L-lactide) (PLLA) bands at 411 and 874 cm-1, the PLLA band at 2947 cm-1 and the poly(ε-caprolactone) band at 2914 cm-1. Raman study shows that growth of the CL content causes the monotonous decrease in the crystallinity degree of PLLA blocks. Density functional theory analysis of LLA decamer in the conformation of helix 103 allows us to assign the PLLA Raman bands. The Raman data on the composition and crystallinity degree of the copolymers correlate very well with the results of XRD and DSC studies, as well as with the information on the composition of the copolymers provided by manufacturer.
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Affiliation(s)
- S O Liubimovskii
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia.
| | - V S Novikov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - E A Sagitova
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - S M Kuznetsov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - A V Bakirov
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya St. 70, 117393 Moscow, Russia; National Research Centre «Kurchatov Institute», Akademika Kurchatova Pl. 1, 123182 Moscow, Russia
| | - P V Dmitryakov
- National Research Centre «Kurchatov Institute», Akademika Kurchatova Pl. 1, 123182 Moscow, Russia
| | - N G Sedush
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya St. 70, 117393 Moscow, Russia; National Research Centre «Kurchatov Institute», Akademika Kurchatova Pl. 1, 123182 Moscow, Russia
| | - S N Chvalun
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya St. 70, 117393 Moscow, Russia; National Research Centre «Kurchatov Institute», Akademika Kurchatova Pl. 1, 123182 Moscow, Russia
| | - L Yu Ustynyuk
- Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory 1(3), 119991 Moscow, Russia
| | - V V Kuzmin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - D D Vasimov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - M N Moskovskiy
- Federal Scientific Agroengineering Center VIM, 1(st) Institutskiy Proezd 5, 109428 Moscow, Russia
| | - G Yu Nikolaeva
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
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Díez-Pascual AM. Polymers and Nanotechnology for Industry 4.0. Polymers (Basel) 2023; 15:3556. [PMID: 37688184 PMCID: PMC10489732 DOI: 10.3390/polym15173556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
The term "polymer" derives from the Greek words "πολύς" meaning "many, much" and "μέρος" meaning "part", and was proposed in 1833 by Jöns Jacob Berzelius, albeit with a different definition from the current IUPAC definition [...].
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Affiliation(s)
- Ana M Díez-Pascual
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra, Madrid-Barcelona Km. 33.6, Alcalá de Henares, 28805 Madrid, Spain
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