What is the heat conductivity for soft PVC?
117198
This has been here for a while without answer.....\nSoft PVC is a plastic, and therefore would not be a good conductor of heat.
931787
whats wrong with PVC ???
1185872
I can think of two ways to measure the absorption and reflection coefficient of a material.  The first would only work with a polished surface.  First measure the intensity of a laser beam with a photodetector, then shoot the laser beam at the surface and aim the reflection at a photodetector.  Coefficient of reflection = transmitted intensity/initial intensity  (coefficient of absorption =1-reflection).  The other, harder way, which would work with any material, is to measure the heat gain in the target.\n\nFor this you're gonna want as small a piece of the target material you can get so that the laser still completely hits it.  Now attach a thermistor to the back of the target (again the smaller and thinner the target the better, ideal would be a foil just thick enough to be completely opaque).  Now shoot the laser at the target and measure the temperature as a function of time  It should be linear up until it starts radiating nearly as fast as it absorbs energy, so take points until it starts to level off and drop points after that.  Now find the specific heat of the thermistor-target apparatus by dipping it in water with a thermometer in it, using the initial and final temperature of the water, the volume of the water, and the initial temp of the apparatus, determine the heat it absorbed per degree it's temperature changed (this will actually give you specific heat*mass which is fine).  Now convert your temperature vs. time data to heat vs. time using the specific heat you determined (temp*(specific heat*mass)).  The slope of the line of best fit for this data will give you the rate it absorbed energy in watts.  Divide this by the lasers output in watts and you get the absorption coefficient.
943056
search polycarbonate+physical properties\ngood luck
1089285
Conductivity does not depend on direction of heat flow.\n\nFound a paper on thermal conductivity see Fig 3
1137013
Thermal Properties Conditions \nTemp. (K) Pressure (Pa) \nMelting Temperature  1357.77 K   101325  \nBoiling Temperature  2835.15 K   101325  \nCritical Temperature  8280 K     \nFusion Enthalpy  208.7 J/g 0  101325  \nHeat Capacity  385 J/kg-K 298.15 more...  100000  \nThermal Conductivity 401 W/m-K 300 more...  101325
674634
Heat is transferred by conduction, convection and radiation. In medium-temperature applications radiation would only be a small part of the total, and an opaque material will prevent radiative escape of heat in any case. Conduction and convection are minimized by the structure of a typical insulator in addition to the material properties mentioned in the first answer. Styrofoam, for instance, consists of very thin partitions of styrene plastic which enclose gas-filled bubbles. This means each convection cell or mixing space is small and essentially a small proportion of the total insulation thickness, so you don't have the coldest internal gas mixing with the hottest gas. Conduction is low because gas conducts heat more slowly than a solid. The conduction path through the solid styrene is convoluted and of small thickness, both of which minimize conduction. In houses, fiberglass insulation uses similar principles except that the air spaces are connected. This means a larger convection cell potentially exists, but it is baffled by all the glass strands, so circulation and mixing are much slower and smaller-scale.
683372
The boiling temperature of acrylonitrile *monomer* is 77.3°C at 760 torr, 64.7°C at 500 torr, 45.5°C at 250 torr, 23.6°C at 100 torr, and 8.7°C at 50 torr.  Melting point is -83.55°C.\n\nHowever, the BP of the polymer -- polyacrylonitrile (PAN) -- would depend on the chain length of the polymer.  Here's a link to a generic MSDS:\nhttp://physchem.ox.ac.uk/MSDS/PO/polyacrylonitrile.html\n\nI would agree with the other answerer that, if you tried to boil PAN, it would melt first, then decompose and char, possibly releasing toxic fumes, before ever getting to the boiling point.  Not recommended without engineering controls.
423892
I'm sure that's what you're supposed to determine in the lab you're working on. Good luck.\n\nI've been able to find a value for the heat capacity of n-hexadecanol (cetyl alcohol) in my copy of _Lange's Handbook of Chemistry, 13th Edition_.  When you've come up with your value from the experiment, post it here and I'll check to see if you're close.
904937
ref\n\nhttp://www.cem.msu.edu/~reusch/VirtualText/polymers.htm
181173
I work with epoxy composites. Epoxys have decent thermal conductivity and are strong, there are also a million different types of epoxys out there, so i'm sure theres a formula that would work for you. Good Luck
1175443
Temp (K)    viscosity (cp = 1mPa*s)\n1080                  1.030\n1100                  0.985\n1120                  0.944\n1140                  0.906\n1160                  0.870\n1180                  0.837\n1200                  0.907\n\nMore data at intermediate temperatures, as well as a parameterized equation for viscosity as a function of T are given in the source listed below.
801436
Use specific heat capacities and latent heats of these materials along with your head to get water at 0C
329557
Try this....\n\nhttp://www.efunda.com/formulae/solid_mechanics/mat_mechanics/pressure_vessel.cfm
981336
There are over 2,500,000 sites out there covering this subject,\n Try this one;\n\nwww,sussex.ac.uk/ engineering/ .../aterm5-fluid mechanics heat transfer.pdf
820184
I think you should break things down and think of the question like this.\n\nThe heat for a process is 250.3J, Its doubled with the same temperrature difference, the temperature difference is 5C.
632669
http://lakeaccess.org/russ/conductivity.htm