Open AccessPartial Depolymerization and Solubilization of Poly[(R)-3-hydroxybutanoate] (PHB) and Its Copolymer with (R)-3-Hydroxyvalerate (BIOPOL®) by Treatment with Li-Amides/LiCl in Tetrahydrofuran at Low Temperature
Author(s) -
Dieter Seebàch,
Albert K. Beck,
Urs Brändli,
Dieter G. Müller,
Michael Przybylski,
Klaus Schneider
Publication year - 1990
Publication title -
chimia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.387
H-Index - 55
eISSN - 2673-2424
pISSN - 0009-4293
DOI - 10.2533/chimia.1990.112
Subject(s) - tetrahydrofuran , depolymerization , copolymer , lithium (medication) , chemistry , mass fraction , solubilization , nuclear chemistry , organic chemistry , polymer , solvent , medicine , biochemistry , endocrinology
The biopolymers PHB and PHB/PHV (mol. weight > 7·105 g·mol?1) from fermentations of certain lot numbers or PHB samples which had previously been precipitated from dichloroethane solution can be dissolved by treatment with excess lithium-di-isopropylamide in LiCl-containing tetrahydrofuran. The samples recovered from these solutions in good yields have molecular weights of 1000–5000 g·mol?1.