Effect of UV-curing conditions on the polymer structures: a …
网页2020年4月30日 · In this study, we investigated the photopolymerization behavior of acrylate using DMPA as an initiator to elucidate the difference in the termination mode and the polymer structures between the...
Light- and heat-triggered reversible luminescent materials based …
网页Anthracene is commonly used in photo-responsive compounds, which can form covalent bonds through photo-cycloaddition. 12–22 Anthracene groups undergo [4 + 4] photo-dimerization when irradiated by UV light (λ > 300 nm) and can be reversed to the original monomers via exposure to a higher energy UV light (λ < 300 nm) 23 or heating to 100 ...
Radical polymerization of acrylic monomers: An overview
网页2018年4月1日 · Uniquely, the radical polymerization of acrylic monomers is strongly affected by radical transfer events which dictate reaction kinetics and lead to a range of distinct macromolecular structures, a fact that went unknown for many years and continues to generate unexpected results.
Intramolecular Coumarin-Dimer Containing Polyurethanes: …
网页2022年9月12日 · The synthesis of an isomer-pure intramolecular coumarin dimer (ICD) in virtually unlimited amounts using a photo flow reactor is described. Based on this compound, polyurethanes with different ratios of hexamethylene diisocyanate and polytetrahydrofuran were synthesized and characterized.
A comprehensive investigation of acrylates photopolymerization ...
网页2021年6月1日 · In order to understand the relationship between properties and polymerization process, this paper employed the combined technique of the mid-infrared spectrometer and photo-rheometer to monitor the acrylate free …
UV-Curable Biobased Polyacrylates Based on a Multifunctional …
网页Using the dimerization mechanism, solvent-cast LA and MA copolymers containing 30 mol % 4CPA were cross-linked under UV light to obtain thin films. The cross-linked films were characterized by dynamic scanning calorimetry, dynamic mechanical analysis, IR, and swelling experiments.
Photodimerization of Coumarin Functionalized Poly(alkyl Acrylate…
网页2007年11月14日 · Coumarin‐containing poly(alkyl (meth)acrylates) were prepared via 70–80% esterification of hydroxy‐containing acrylic copolymers, then solution cast into thin films and photocrosslinked via the dimerization of coumarin derivatives with UVA light.
Synthesis of UV-curable polyurethane-acrylate hybrids with …
网页In the present work, a series of soft, transparent, and UV-photopolymerizable polyurethane-acrylate (PUA) hybrids were synthesized via a two-step polymerization route, followed by a UV-curing process and maintaining two constant ratios of a soft/hard segment in the polyurethane (PU) structure as well as using three different acrylate segment ...
Highly photosensitive furan acrylate derivatives and their solid …
网页2022年8月3日 · A bifunctional diethylene glycol difuran acrylate (DEFA) and a trifunctional trimethylolpropane trifuran acrylate (TMFA) monomer for solid-state photopolymerization were synthesized from a biomass material, furfural. High molar extinction coefficients in the order of 104 indicate the good UV absorption prope.
Microgels of poly(hydroxyethyl acrylate-co-coumaryl acrylate-co ...
网页2013年5月16日 · In this study, photo-responsive microgels were prepared by dispersing poly (hydroxyethyl acrylate-co-coumaryl acrylate-co-octadecyl acrylate)s [P (HEA-CA-ODA)s] in an aqueous phase. HEA was copolymerized as a hydrophilic monomer, CA as a photo-reactive monomer, and ODA as a hydrophobic monomer.
跳至内容