High pressure water-initiated ring opening polymerization for the synthesis of well-defined α-hydroxy-ω-(carboxylic acid) polycaprolactones
PBN-AR
Instytucja
Wydział Matematyki, Fizyki i Chemii (Uniwersytet Śląski w Katowicach)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
GREEN CHEMISTRY (45pkt w roku publikacji)
ISSN
1463-9262
EISSN
Wydawca
ROYAL SOC CHEMISTRY
DOI
URL
Rok publikacji
2017
Numer zeszytu
15
Strony od-do
3618-3627
Numer tomu
19
Identyfikator DOI
Liczba arkuszy
0,45
Streszczenia
Język
EN
Treść
The development of a green ε-caprolactone (CL) polymerization method is the most important challenge in modern polymer chemistry. Herein, we propose a novel method to produce polyesters of a well-defined chemical structure, and narrow molecular weight distributions by using a combination of high pressure, temperature and water. We found two competitive phenomena: polymerization and crystallization occurring at high compression. Once the latter process is avoided, the control over the reaction is reached. By varying the thermodynamic conditions and concentration of water molecules, polymers of moderate molecular weights (Mn = 1.6–19.0 kg mol−1) and dispersities (Đ ≈ 1.07–1.50) could be produced. Additional NMR experiments supported by further MALDI TOF analysis enabled us to determine telechelic hydroxyl and carboxylic/acidic moieties as terminal groups of produced PCLs. Finally, the latter measurements also indicated that generally an increase in dispersity above 1.3 is strongly related to the competitive reactions leading to the production of cyclic polyesters. The presented results open up alternative routes to produce PCLs of enhanced biocompatibility and biodegradability using the greenest method reported to date.
Cechy publikacji
original-article
Inne
System-identifier
3342800136819
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