Journal ArticleDOI
Controlled ring-opening polymerization of lactide and glycolide.
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TLDR
This work focuses on the characterization of the phytochemical components of Lactide ROP and their role in the regulation of cell reprograming.Abstract:
23 Stereocontrol of Lactide ROP 6164 231 Isotactic Polylactides 6164 232 Syndiotactic Polylactides 6166 233 Heterotactic Polylactides 6166 3 Anionic Polymerization 6166 4 Nucleophilic Polymerization 6168 41 Mechanistic Considerations 6168 42 Catalysts 6169 421 Enzymes 6169 422 Organocatalysts 6169 43 Stereocontrol of Lactide ROP 6170 44 Depolymerization 6170 5 Cationic Polymerization 6170 6 Conclusion and Perspectives 6171 7 Acknowledgments 6173 8 References and Notes 6173read more
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Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide
TL;DR: In this article, two new homogeneous dinuclear catalysts for the ring-opening copolymerization of phthalic anhydride (PA)/cyclohexene oxide (CHO) and the terpolymerisation of PHTHC/CHO/CO2 are reported.
Journal ArticleDOI
β-Diketiminate aluminium complexes: synthesis, characterization and ring-opening polymerization of cyclic esters
Shaogang Gong,Haiyan Ma +1 more
TL;DR: The monomeric structure of the aluminium complex 3k was confirmed by an X-ray diffraction study, which shows that the aluminium center is coordinated by both of the nitrogen donors of the chelating diketiminate ligand and the two ethyl groups in a distorted tetrahedral geometry.
Journal ArticleDOI
ω-Pentandecalactone Polymerization and ω-Pentadecalactone/ε-Caprolactone Copolymerization Reactions Using Organic Catalysts
TL;DR: In this article, the catalytic behavior of several inexpensive and simple N-heterocyclic organic catalysts in ring-opening polymerization of ω-pentadecalactone (PDL) and e-caprolactone(CL) has been studied.
Journal ArticleDOI
Exploitation of dinuclear salan aluminum complexes for versatile copolymerization of ε-caprolactone and L-lactide
Yuan Wang,Haiyan Ma +1 more
TL;DR: By combining the influence of excess alcohol, temperature and monomer-to-initiator ratios in the feed, dinuclear salan aluminum complexes L(R)Al(2)Me(4) exhibited a high degree of control towards the copolymerization of L-LA and ε-CL, producing blocky, gradient, tapered and random copolymers.
Journal ArticleDOI
A Strategy for Control of "Random" Copolymerization of Lactide and Glycolide: Application to Synthesis of PEG-b-PLGA Block Polymers Having Narrow Dispersity.
TL;DR: A novel strategy that employs a controlled addition of the more reactive glycolide monomer to a solution containing the lactide monomers, the poly(ethylene glycol) (PEG) macroinitiator, and DBU catalyst was developed and synthesized a series of block copolymers that exhibited excellent correlation of the expected and observed molecular weights and possessed narrow PDIs.
References
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Journal ArticleDOI
N-heterocyclic carbenes: a new concept in organometallic catalysis.
TL;DR: N-Heterocyclic carbenes have become universal ligands in organometallic and inorganic coordination chemistry as mentioned in this paper, and they not only bind to any transition metal, be it in low or high oxidation states, but also to main group elements such as beryllium, sulfur, and iodine.
Journal ArticleDOI
Biodegradable nanoparticles for drug and gene delivery to cells and tissue
Jayanth Panyam,Vinod Labhasetwar +1 more
TL;DR: Based on the above mechanism, various potential applications of nanoparticles for delivery of therapeutic agents to the cells and tissue are discussed.
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Polylactic Acid Technology
TL;DR: Polylactic acid is proving to be a viable alternative to petrochemical-based plastics for many applications It is produced from renewable resources and is biodegradable, decomposing to give H2O, CO2, and humus, the black material in soil as mentioned in this paper.
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Polymeric Systems for Controlled Drug Release
TL;DR: Kevin Shakesheff investigates new methods of engineering polymer surfaces and the application of these engineered materials in drug delivery and tissue engineering.
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Synthetic biodegradable polymers as orthopedic devices.
John Middleton,Arthur J. Tipton +1 more
TL;DR: In this paper, the authors focus on properties of biodegradable polymers which make them ideally suited for orthopedic applications where a permanent implant is not desired, and an overview of biocompatibility and approved devices of particular interest in orthopedics are also covered.