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Glass has an R value of approximately 0.14 per inch thickness
Celluloid (Lexan, Plexiglass?) has an R value of approximately 0.7 per inch thickness
[source: http://www.bobvila.com/wwwboard/messages/37235.html]
U value is the inverse of the R value. (U-value = 1/R-value)
Using this equation and the values above, the the U value of plexiglass is approximately 1.4 per inch of thickness. The U-value of glass is 7.0 per inch of thickness.
So, if these values are correct, then Plexiglas is approximately five times as resistant to heat transfer by conduction as glass.
I have seen this conclusion elsewhere a long time ago, but I have also seen values for plexiglass on a plastics dealer's web site that said the R-values of glass and plexiglass were approximately equal.
On another site, a value of 1.35 Btu*in/hr*ft^2*ºF
[source:
http://www.plasticsintl.com/sortable_materials.php?display=thermal&sort=thermal_conductivity]
There are some values given in SI units on other sites, generally consistent with the values given above.
Thermal conductivity of Acrylic sheet is listed as 0.2 (W·m−1·K−1) while glass is listed as having a range of values from 0.8 to 1.4, depending on the composition (0.8d−0.93e((96%SiO2)1.2-1.4g W-m−1·K−1)
[http://en.wikipedia.org/wiki/List_of_thermal_conductivities]
Again, then, the U value or thermal conductivity of plexiglass is given as between 1/4 and 1/7 that of glass.
More authoritative information and further discussion of this question would be greatly appreciated.
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U value of r-19 insulation?
The U value is the inverse of the R value. For R value 19 insulation the U value is 1/19, or 0.0526.
Which is thicker on plexiglass 0.93 or 0.118?
0.93 is thicker than 0.118
What is the value of the 2 in 3.902?
2 thousandths
How do you draw and label the place value line?
i don't know u tell me
What is the value of you in this equation 5u-10 equals you plus 46?
Do you mean 5u-10 = u+46? If so then:- 5u-10 = u+46 5u-u = 46+10 4u = 56 u = 14
What is the insulating value of plexiglass As in the R value of a house wall Or the U value of glass?
see http://www.k-mac-plastics.net/data%20sheets/ATG-014S1.pdf i believe it is 1/3 for .325 inch thick
Plexiglass Sheets?
form_title= Plexiglass form_header= Make DIY projects easily with plexiglass. What size plexiglass do you need?*= _ [50] What will you be making with the plexiglass?*= _ [50] Do you want the plexiglass delivered?*= () Yes () No
How do you get dries egg off plexiglass?
how do you get egg off of plexiglass
I accidentally got leather cleaner on the plexiglass of my car instrument panel. Now it is covered with spots and a haze that I can't remove. How can I get rid of the spots and haze?
you get plexiglass cleaner you get plexiglass cleaner you get plexiglass cleaner
Are there any types of plexiglass that resist scratches?
Most plexiglass does scratch, acrylic plexiglass can resist scratches better then most types but will still get them.
Is plexiglass lighter than glass?
Yes. Plexiglass is a plastic, whereas glass is comprised mainly of silicas. Glass is about twice as dense as plexiglass, so a sheet of plexiglass is lighter than a sheet of glass the same size.
Can you use plexiglass in tanning beds?
My acrylic cracked on my tanning bed can I replace it with plexiglass?
How do you tell the difference between plexiglass and glass?
You can differentiate plexiglass from glass by tapping on it - plexiglass will produce a dull sound, while glass will create a clear ringing sound. Additionally, plexiglass is more flexible and lighter than glass. Finally, you can also try touching the surface - plexiglass is typically warmer to the touch compared to glass.
Is plexiglass bulletproof?
Absolutely. You should be perfectly safe if you walk into a war zone wearing nothing but plexiglass.
What is its wavelength in Plexiglass where light travels at 67 percent of its speed in air?
To find the wavelength of light in Plexiglass, you need to take into account the change in speed of light. Since light travels at 67% of its speed in air in Plexiglass, you would need to calculate the wavelength using the formula: wavelength in Plexiglass = wavelength in air / refractive index of Plexiglass. Refractive index of Plexiglass is calculated as speed of light in air / speed of light in Plexiglass.
How much does a plexiglass window cost?
Depending of what store u buying but it usually cost $20.00 MAX (30.00) the least 10 to 15 dollars.
How cut plexiglass?
To cut plexiglass you should use a handsaw and make sure it is a handsaw that can cut in straight lines. You should also measure out how you much you need and what shape you need.
