scholarly journals Bentonite acrylic copolymers modified as effective oil absorbents

2015 ◽  
Author(s):  
E. N. Glazacheva ◽  
M. V. Uspenskaya ◽  
I. E. Strelnikova
Keyword(s):  
Acrylic Copolymers

Spectral and kinetic manifestations of chain flexibility and polarity in reversible photoisomerization of spironaphthoxazine-based acrylic copolymers

2021 ◽  
Author(s):  
Vahid Hamrang ◽  
Ali Reza Mahdavian
Keyword(s):  
Photochromic Properties ◽  
Chain Flexibility ◽  
Acrylic Copolymers

Future advances of photoresponsive materials essentially depend on our knowledge about how the substrates, and typically their Tg and polarity, affect photochromic properties. Here, these were followed in two separate...

scholarly journals Feasibility of Crosslinked Acrylic Shape Memory Polymer for a Thrombectomy Device

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Andrea D. Muschenborn ◽  
Keith Hearon ◽  
Brent L. Volk ◽  
Jordan W. Conway ◽  
Duncan J. Maitland
Keyword(s):  
Crosslink Density ◽  
Blood Clot ◽  
Shape Memory Polymer ◽  
Thermomechanical Properties ◽  
Recovery Stress ◽  
Element Analysis ◽  
Clot Removal ◽  
Acrylic Copolymers ◽  
Thrombectomy Device ◽  
And Performance

Purpose. To evaluate the feasibility of utilizing a system of SMP acrylates for a thrombectomy device by determining an optimal crosslink density that provides both adequate recovery stress for blood clot removal and sufficient strain capacity to enable catheter delivery. Methods. Four thermoset acrylic copolymers containing benzyl methacrylate (BzMA) and bisphenol A ethoxylate diacrylate (Mn∼512, BPA) were designed with differing thermomechanical properties. Finite element analysis (FEA) was performed to ensure that the materials were able to undergo the strains imposed by crimping, and fabricated devices were subjected to force-monitored crimping, constrained recovery, and bench-top thrombectomy. Results. Devices with 25 and 35 mole% BPA exhibited the highest recovery stress and the highest brittle response as they broke upon constrained recovery. On the contrary, the 15 mole% BPA devices endured all testing and their recovery stress (5 kPa) enabled successful bench-top thrombectomy in 2/3 times, compared to 0/3 for the devices with the lowest BPA content. Conclusion. While the 15 mole% BPA devices provided the best trade-off between device integrity and performance, other SMP systems that offer recovery stresses above 5 kPa without increasing brittleness to the point of causing device failure would be more suitable for this application.

Thermal and rheological properties of acrylic copolymers possessing crystallizable polyester side chains

1991 ◽  
Vol 42-43 (1) ◽  
pp. 219-228
Author(s):  
K. M. Scholsky ◽  
E. B. Orler ◽  
K. J. Bixler ◽  
R. W. Stackman
Keyword(s):  
Rheological Properties ◽  
Side Chains ◽  
Acrylic Copolymers

scholarly journals Functionalized crosslinked acrylic copolymers as supports for biologically active proteins

1986 ◽  
Vol 28 (2) ◽  
pp. 294-296 ◽  
Author(s):  
Steliana Maxim ◽  
Aurelia Flondor ◽  
A. Carpov ◽  
V. Rugina ◽  
D. Cojocaru ◽  
...  
Keyword(s):  
Biologically Active ◽  
Acrylic Copolymers

Synthesis and characterization of functional acrylic copolymers via RAFT mini-emulsion polymerization

2017 ◽  
Author(s):  
Onur Yılmaz ◽  
Çiğdem Kılıçarislan Özkan ◽  
Catalina N. Yılmaz ◽  
Ali Yorgancıoğlu ◽  
Hasan Özgünay ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Synthesis And Characterization ◽  
Acrylic Copolymers

One-pot synthesis of PMMA/montmorillonite nanocomposites

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Adam Kiersnowski ◽  
Maria Trelinska-Wlazlak ◽  
Justyna Dolega ◽  
Jacek Piglowski
Keyword(s):  
Single Step ◽  
Layered Silicates ◽  
Trimethylammonium Chloride ◽  
One Pot ◽  
Structural Investigations ◽  
Preparation Methods ◽  
Simple Preparation ◽  
Acrylic Copolymers ◽  
Synthetic Routes ◽  
Montmorillonite Nanocomposites

AbstractThis article describes simple preparation methods of poly(methyl methacrylate) (PMMA)/synthetic montmorillonite nanocomposites by single-step insitu polymerizations. Compatibility between PMMA and the silicate was ensured by an addition of (3-acrylamidepropyl) trimethylammonium chloride (AAPTMA). The work also compares how different synthetic routes, namely emulsion and solution polymerization, affect the structure as well as thermal and mechanical properties of obtained nanocomposites. The results of structural investigations clearly show, that both the techniques lead to intercalated nanocomposites, but emulsion polymerization allows more effective deflocculating and intercalating of the clay with acrylic copolymers. The addition of small amounts of layered silicates causes an increase in thermal stability and stiffness of the materials. It is demonstrated that at 5 wt. % of the filler, the temperature of 10 % weight loss was shifted up by nearly 50 K in comparison to the neat PMMA. In the same sample, the Young’s modulus of the material was found to be increased by 26 %.

Acute clouding of hydrophilic acrylic copolymer intraocular lenses:four cases report

2019 ◽  
Author(s):  
Xiaochen Wang ◽  
Yusen Huang ◽  
Xiaoming Wu
Keyword(s):  
Temperature Fluctuation ◽  
The Other ◽  
Intraocular Lenses ◽  
Transient Temperature ◽  
Acrylic Copolymer ◽  
Case Presentation ◽  
Temperature Changes ◽  
Acrylic Copolymers ◽  
Handling Methods ◽  
Phacoemulsification Cataract Surgery

Abstract Background: Intraoperative acrylic intraocular lenses (IOLs) transient clouding of several kinds of hydrophilic IOLs have been reported due to temperature changes. However, we ignored the particularity of its material and the handling methods. Case presentation: We present four cases of acute clouding of hydrophilic acrylic intraocular lenses (IOLs). Four patients underwent phacoemulsification cataract surgery with implantation of L-312, 809M, and 839M IOLs, respectively. The IOLs became opaque in varying degrees during surgery. Lens replacement was performed immediately in one case, while the cloudy IOLs were remained in the other three cases. Postoperatively, all IOLs recovered transparency. Conclusions：Temperature fluctuation was the cause of the acute opacification of these IOLs made of hydrophilic acrylic copolymers, which reminds us of attaching importance to the temperature of IOL storage and delivery in winter months. Keywords: Opacification, transient, temperature, material, cataract.

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