Two initiators containing a cleavable ester bond were compared in the lipase-catalyzed ROP of CL and PDL. The results show that transesterification reactions are present at high rates throughout the enzymatic ROP and start at low conversion. HEA and HEMA displayed similar reaction efficiencies as initiators (acyl acceptors) in the enzymatic ROP. However, transacylation reactions on the HEA-initiated polyesters were found to be 15 times faster. While in both cases the amount of HEA- and HEMA-initiated polymers could be maximized by short reaction times, a well-defined (meth)acrylation by this approach was not possible. Our results show that transesterification reactions have to be considered when performing an enzyme-catalyzed ROP.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/mabi.200800290 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Biocompatible PVAc--PLLA Acrylate Polymers for DLP 3D Printing with Tunable Mechanical Properties.
ACS Appl Mater Interfaces
November 2024
Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India.
The technological advancement of Additive Manufacturing has enabled the fabrication of various customized artifacts and devices, which has prompted a huge demand for multimaterials that can cater to stringent mechanical, chemical, and other functional property requirements. Photocurable formulations that are widely used for Digital Light Processing (DLP)/Stereolithography (SLA) 3D printing applications are now expected to meet these new challenges of hard and soft or stretchable structural requirements in addition to good resolution in multiple scales. Here we present a biocompatible photocurable resin formulation with tunable mechanical properties that can produce hard or stretchable elastomeric 3D printed materials in a graded manner.
View Article and Find Full Text PDFDoped Electrospinned Material-Guides High Efficiency Regional Bone Regeneration.
Polymers (Basel)
March 2023
Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain.
The main target of bone tissue engineering is to design biomaterials that support bone regeneration and vascularization. Nanostructured membranes of (MMA)1-co-(HEMA)1/(MA)3-co-(HEA)2 loaded with 5% wt of SiO-nanoparticles (Si-M) were doped with zinc (Zn-Si-M) or doxycycline (Dox-Si-M). Critical bone defects were effectuated on six New Zealand-bred rabbit skulls and then they were covered with the membranes.
View Article and Find Full Text PDFAllergic Contact Dermatitis, Allergic Airborne Dermatitis, and Occupational Asthma Caused by (meth)acrylates in Artificial Nails.
Acta Dermatovenerol Croat
November 2022
Professor Suzana Ljubojević Hadžavdić, MD, PhD¸, Department of Dermatology and Venereology, University Hospital Center Zagreb University of Zagreb School of Medicine, Zagreb, Croatia;
Allergic contact dermatitis (ACD) caused by (meth)acrylates is traditionally an occupational disease among dentists, printers, and fiberglass workers. With the use of artificial nails, cases have been reported both in nail technicians and in users. ACD caused by (meth)acrylates used in artificial nails is a relevant problem for both nail artists and consumers.
View Article and Find Full Text PDFFast UV-Curable Zwitter-Wettable Coatings with Reliable Antifogging/Frost-Resisting Performances.
Biomimetics (Basel)
October 2022
Department of Anesthesiology, The Second Hospital of Jilin University, Changchun 130061, China.
Antifogging surfaces with unique properties to migrate severe fog formation have gained extensive interest, which is of particular interest for transparent substrates to obtain high visibility and transparency. To date, a large number of strategies including superhydrophilic or superhydrophobic surfaces and titanium dioxide (TiO)-based composite coatings have been developed based on different mechanisms. Although these surfaces exhibit effective antifogging properties, the rigid nanostructures, cumbersome preparation, and the need for UV light excitation largely limit their widespread applications.
View Article and Find Full Text PDFSynthesis and characterization of tung oil-based UV curable for three-dimensional printing resins.
RSC Adv
August 2022
State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry Changsha 410000 China
Using tung oil as the raw material, a new bio-based prepolymer was successfully synthesized by reacting with acrylic-modified rosin (β-acryloyl nutrient ethyl) ester (ARA)/acrylic-2-hydroxyethyl ester (HEA) followed by the use of the above composite material as the matrix and then reacting with the active diluent (2-HEMA, TPGDA) and the photoinitiator TPO and Irgacure1173 to successfully synthesize a new type of bio-based prepolymer-acrylate-epoxy tung oil polypolymer (AETP). The tung oil monomer before and after the epoxy formation was compared by proton NMR spectroscopy, and the chemical structure of AETP was analyzed by Fourier transform spectroscopy. Tung oil has an acid value of 1.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!