An In-Situ Study of Laser-Induced Plume Radiance and Thermal Effects of Laser Irradiated Polycarbonate and Poly(Methyl Methacrylate) Samples

1990 ◽  
Vol 201 ◽  
Author(s):  
Pearl W. Yip
Keyword(s):  
Methyl Methacrylate ◽  
Thermal Effects ◽  
Continuous Wave ◽  
Test Results ◽  
Poly Methyl Methacrylate ◽  
In Situ Study ◽  
Military Applications ◽  
Recovery Times ◽  
Human Eyes

AbstractThreats of lasers to human eyes and electro-optics on the modern battlefield has been significantly increased due to the rapid growth of laser technology in military applications. Currently polycarbonate (PC) and poly [methyl methacrylate] (PMMA) are being used as transparencies for aircraft and goggle materials for aircrews and combat soldiers [Ref 1,2]. A carefully monitored laser test was conducted on these two particular polymers using a medium-power, continuous-wave CO2 laser to determine the brightness of the laser-induced plume radiance and how much luminance was transmitted to the back of the sample. Plume luminance for photopic (daytime) and scotopic (nighttime) visual conditions, as well as the recovery times for human eyes exposed to these levels of luminance were calculated. Our test results demonstrated that the plume induced by the CW CO2 laser irradiation can be an ocular hazard to soldiers operating behind these conventional transparent materials.

Rheology and morphology of linear polyurethane and poly(methyl methacrylate) blends formed in situ

2011 ◽  
Vol 53 (10) ◽  
pp. 955-962 ◽  
Author(s):  
V. F. Shumskii ◽  
L. F. Kosyanchuk ◽  
I. P. Getmanchuk ◽  
O. V. Babich ◽  
O. I. Antonenko
Keyword(s):  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate

In-situ generation of Au nanoparticles in poly(methyl methacrylate) films via MeV proton irradiation

2021 ◽  
pp. 125205
Author(s):  
Oleksandr Romanenko ◽  
Petr Slepička ◽  
Ondřej Kvítek ◽  
Miroslav Šlouf ◽  
Pavel Němecek ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Au Nanoparticles ◽  
Proton Irradiation ◽  
Poly Methyl Methacrylate ◽  
In Situ Generation

Solvent Assisted Coaxial-Electrospun Poly Methyl Methacrylate Polymer and Study of Resultant Fibers

2020 ◽  
Vol 18 (12) ◽  
pp. 905-909
Author(s):  
Arjun Satheesh ◽  
A. A. Alagiriswamy ◽  
S. Devanand ◽  
S. Nithiyanantham
Keyword(s):  
Methyl Methacrylate ◽  
Sem Analysis ◽  
Fiber Formation ◽  
Dimethyl Formamide ◽  
Poly Methyl Methacrylate ◽  
The Core ◽  
Pure Solvent ◽  
Core Solution ◽  
Polymer Dispersions

Electrospinning of dispersions with higher viscosity and limited flow may be carried out, based on the solvent assisted coaxial technique, where the flow of the core dispersion is supported by a free flowing sheath solvent. In the present work, the sheath solvents used are chloroform, toluene and dimethyl formamide and we discuss the fiber formation of Poly Methyl Methacrylate (PMMA) (dispersion-25 wt%). PMMA dispersed in chloroform is taken as the core solution and the sheath is pure solvent. The In-Situ effect of different sheath solvents in fiber formation at two different tip to collector distances are studied. The fibers formed are subjected to SEM analysis and the characteristics are analysed. The fiber formation of high viscos polymer dispersions makes the same materials subjectable to electrospinning and further applications.

scholarly journals Thermal properties of poly (methyl methacrylate)/organomodified montmorillonite nanocomposites obtained by in situ photopolymerization

2013 ◽  
Vol 17 (1) ◽  
pp. 265-270 ◽  
Author(s):  
Silvano Rodrigo Valandro ◽  
Patrícia Coelho Lombardo ◽  
Alessandra Lima Poli ◽  
Marco Antonio Horn Jr ◽  
Miguel Guillermo Neumann ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Organomodified Montmorillonite ◽  
Montmorillonite Nanocomposites
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