Results 1 to 10 of about 7,899 (298)

Thermal Stability and Kinetics of Thermal Decomposition of Statistical Copolymers of N-Vinylpyrrolidone and Alkyl Methacrylates Synthesized via RAFT Polymerization

open access: yesJournal of Chemistry, 2021
The thermal stability and the kinetics of thermal decomposition of statistical copolymers of N-vinylpyrrolidone (NVP) with the alkyl methacrylates, hexyl methacrylate (HMA) and stearyl methacrylate (SMA), were studied by Thermogravimetric Analysis (TGA ...
Theodoros Gikarakis   +6 more
doaj   +1 more source

Thermal Optical Analysis of Cholesteryl Methacrylate and Methyl Methacrylate Copolymers [PDF]

open access: yesPolymer Journal, 1985
As a side chain type of liquid crystalline polymer, the copolymers of cholesteryl methacrylate and butyl methacrylate were synthesized. When the mesomorphic behavior of the copolymers was examined with a polarized microscope, the observed transition temperatures were so much varied that the mesomorphic behavior had to be studied by thermal optical ...
Shoji, Kikuo   +3 more
openaire   +2 more sources

Ultrastructure of the elementary fibril in extended and condensed chromatin and in metaphase chromosomes

open access: yesActa Societatis Botanicorum Poloniae, 2015
The chromatin Ultrastructure of nuclei in ultrathin sections of root meristem in Cucurbita pepo - the species poor in DNA, and in Haemanthus katharinae - rich in DNA was compared.
M. J. Olszewska
doaj   +1 more source

Meta-analysis of the clinical behavior of posterior direct resin restorations: Low polymerization shrinkage resin in comparison to methacrylate composite resin. [PDF]

open access: yesPLoS ONE, 2018
Polymerization shrinkage of resin composite can compromise the longevity of restorations. To minimize this problem, the monomeric composition of composites have been modified.
Paula de Castro Kruly   +6 more
doaj   +1 more source

Prediction of Nanoparticle Sizes for Arbitrary Methacrylates Using Artificial Neuronal Networks

open access: yesAdvanced Science, 2021
Particle sizes represent one of the key factors influencing the usability and specific targeting of nanoparticles in medical applications such as vectors for drug or gene therapy.
Julian Kimmig   +4 more
doaj   +1 more source

Dentin bond strength evaluation between a conventional and universal adhesive using etch-and-rinse strategy

open access: yesBrazilian Journal of Oral Sciences, 2021
Aim: The aim of this study was to compare the microtensile bond strength (μTBS) and the characteristics of the adhesive interface of Scotchbond Universal - SU – etch-and-rise mode (3M ESPE) and Adper Scotchbond Multi-Purpose - MP (3M ESPE) to dentin over
Genine Moreira de Freitas Guimarães   +5 more
doaj   +1 more source

Polarization holography in azobenzene polymeric films prepared using the new chemical method

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2020
The recording media for polarization holography based on azobenzene polymers are obtained by polymer-analogous transformations of polymethacrylic acid and its copolymers with alkyl methacrylates.
N.A. Davidenko   +5 more
doaj   +1 more source

Microleakage of two types of low-shrinkage composite resins in class II cavities on primary molars

open access: yesCaspian journal of dental research, 2019
Introduction: In direct aesthetic restoration, microleakage resulting from polymerization shrinkage of resin composites is still challenging. Different strategies such as maximizing the amount of inorganic filler with prepolymerized filler and different ...
Fatemeh Pachenari   +3 more
doaj  

Tetrabutylammonium Bromide Media Aza-Michael Addition of 1,2,3,6-Tetrahydrophthalimide to Symmetrical Fumaric Esters and Acrylic Esters under Solvent-Free Conditions

open access: yesMolecules, 2010
The aza-Michael addition of 1,2,3,6-tetrahydrophthalimide with symmetrical fumaric esters has been performed efficiently in a solvent-free system at 100 °C and using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a base in the presence of tetrabutylammonium ...
Mohammadreza Zamanloo   +3 more
doaj   +1 more source

Fluorescently Tagged Poly(methyl methacrylate)s

open access: yesMolecules
Plastic pollution is a global problem affecting the environment and, consequently, people’s well-being. Careful and timely end-of-life plastic recycling is certainly a way, albeit a partial one, to remedy the problem.
Fabia Grisi   +6 more
doaj   +1 more source

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