Počet záznamů: 1
Polypseudorotaxanes between .alpha.-cyclodextrin and poly(propylene glycol)-b-poly(ethylene glycol)-b-poly(propylene glycol) copolymers studied by MALDI-TOF mass spectrometry
- 1.0456042 - ÚMCH 2017 RIV GB eng J - Článek v odborném periodiku
Horský, Jiří - Walterová, Zuzana
Polypseudorotaxanes between .alpha.-cyclodextrin and poly(propylene glycol)-b-poly(ethylene glycol)-b-poly(propylene glycol) copolymers studied by MALDI-TOF mass spectrometry.
European Polymer Journal. Roč. 74, January (2016), s. 256-263. ISSN 0014-3057. E-ISSN 1873-1945
Grant ostatní: OPPK(XE) CZ.2.16/3.1.00/24504
Institucionální podpora: RVO:61389013
Klíčová slova: polypseudorotaxanes * reverse pluronics * cyclodextrin
Kód oboru RIV: CD - Makromolekulární chemie
Impakt faktor: 3.531, rok: 2016
MALDI-TOF mass spectrometry is used to show that formation of solid polypseudorotaxanes between alpha-cyclodextrin (alpha-CD) and poly(propylene glycol)–poly(ethylene glycol)–poly(propylene glycol) block copolymers (PPG–PEG–PPG, Reverse Pluronics) is a block length selective process. A comparison of copolymer composition matrices of neat Reverse Pluronics 10R5 and 17R4 and of the copolymers in their precipitated complexes with alpha-CD shows that the distribution with respect to an absolute PPG content is not affected by the complexation, which means that complexation occurs with Reverse Pluronics generally, not just with the fraction of copolymers with at least one outer block short or completely absent and that alpha-CD can slide even over block of 20 PG. Nevertheless, the complexation is a selective process with respect to PEG as copolymers with shorter PEG blocks are more abundant in the supernatant while the content of PPG remains almost unchanged for both Reverse Pluronics.
Trvalý link: http://hdl.handle.net/11104/0256641
Počet záznamů: 1