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Modification of properties of poly(butylene succinate) by copolymerization with tartaric acid-based monomers
(2014-12-01)
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The two cyclic acetals, 2,3-di-O-methylene-l-threitol and dimethyl 2,3-di-O-methylene-l-threarate, were used for the synthesis of two series of PBS copolyesters differing in which unit, butylene or succinate, was replaced, ...
Biodegradable copolyesters of poly(hexamethylene terephthalate) containing bicyclic 2,4:3,5-di-O-methylene-D-glucarate units
(2014-11-01)
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A set of copolyesters (PHTxGluxy) with compositions ranging between 90/10 and 50/50 in addition to the parent homopolyesters poly(hexamethylene terephthalate) (PHT) and PHGlux, are prepared by the melt polycondensation of ...
Carbohydrate-based PBT copolyesters from a cyclic diol derived from naturally occurring tartaric acid: a comparative study regarding melt polycondensation and solid-state modification
(2014-04-01)
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2,3-O-Methylene-L-threitol (Thx) is a cyclic carbohydrate-based diol prepared by acetalization and subsequent reduction of the naturally occurring tartaric acid. The structure of Thx consists of a 1,3-dioxolane ring with ...
Chemical structure and microstructure of poly(alkylene terephthalate)s, their copolyesters, and their blends as studied by NMR
(2014-11-17)
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The use of NMR spectroscopy in solution to investigate the chemical structure of engineering poly(alkylene terephthalate)s such as poly(ethylene terephthalate) (PET), poly(trimethylene terephthalate) (PTT), and poly(butylene ...
Bio-based poly(ethylene terephthalate) copolyesters made from cyclic monomers derived from tartaric acid
(Elsevier, 2014-05-13)
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Two cyclic acetal compounds, 2,3-O-methylene L-threitol and dimethyl 2,3-O-methylene L-threarate, both coming from naturally-occurring tartaric acid, were used as comonomers to replace ethylene glycol and dimethyl terephthalate ...
Partially renewable copolyesters prepared from acetalized d-glucitol by solid-state modification of poly(butylene terephthalate)
(2014-01-15)
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The backbone of poly(butylene terephthalate) (PBT)
was modified with 2,4:3,5-di-
O
-methylene-
D
-glucitol (Glux)
using solid-state modification (SSM). The obtained copolyest-
ers proved to have a non-random overall ...
Poly(ß,L-malic acid)/Doxorubicin ionic complex: A pH-dependent delivery system
(2014-08-01)
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Poly(beta,L-malic acid) (PMLA) was made to interact with the cationic anticancer drug Doxorubicin (DOX) in
aqueous solution to form ionic complexes with different compositions and an efficiency near to 100%. The
PMLA/DOX ...
Renewable terephthalate polyesters from carbohydrate-based bicyclic monomers
(2014-04-01)
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Poly(alkylene terephthalate)s, PET and PBT in particular, are materials of great relevance and growing projection in the thermoplastic field but are today almost totally produced from fossil resources. The current huge ...
Nanoparticles of esterified polymalic acid for controlled anticancer drug release
(2014-09-01)
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Esterification of microbial poly(malic acid) is performed with either ethanol or 1-butanol to obtain polymalate conjugates capable to form nanoparticles (100–350 nm). Degradation under physiological conditions takes place ...
Complexes of polyglutamic acid and long-chain alkanoylcholines: Nanoparticle formation and drug release
(2014-05-01)
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Ionic complexes of microbial poly(¿-glutamic acid) and alkanoylcholines are fully bio-based comb-like systems able to self-organize in an ordered amphiphilic structure made of hydrophobic and hydrophilic alternating layers. ...