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*several containers with closable lids (30-100 ml volume) | *several containers with closable lids (30-100 ml volume) | ||
*spoon for adding small amounts of glass powder | *spoon for adding small amounts of glass powder | ||
* | *aluminum baking pan for quick heating | ||
* | *2 sheets of aluminum foil (12x12 in approx) | ||
* | *heat-resistant gloves | ||
*pliers | |||
*timer of some sort | |||
==Calibration & Tolerances== | ==Calibration & Tolerances== | ||
*zero balance w/ empty container before each measurement | *zero balance w/ empty container before each measurement | ||
*tolerance of MyWeigh iM01 balance is 1000+/- 0.01 grams | *tolerance of MyWeigh iM01 balance is 1000+/- 0.01 grams | ||
*sample mass should fall within a tolerance of +/- 0.1g, preferrably within 0.01 or 0.02 for more precision | *sample mass should fall within a tolerance of +/- 0.1g, preferrably within 0.01 or 0.02 for more precision | ||
==Operation & Procedure== | ==Operation & Procedure== | ||
# Ask Dr. Pearce for swipe access to DOW 901 (OSHE lab) if you don't already have access | # Ask Dr. Pearce for swipe access to DOW 901 (OSHE lab) if you don't already have access | ||
Line 52: | Line 56: | ||
# place glass container with cover on top onto hot plate, with thermocouple inside, touching bottom of glass container | # place glass container with cover on top onto hot plate, with thermocouple inside, touching bottom of glass container | ||
# turn hot plate to 5 using the dial on the front | # turn hot plate to 5 using the dial on the front | ||
# measure out | # measure out 10g glass powder and 90g PP for 10% glass composite | ||
# when thermocouple | # when thermocouple reads 160C, start stopwatch, and add plastic to pan and swirl around until mostly level | ||
# | * use the pliers to grip the pan, as it will be hot and may burn hands through gloves | ||
# | # monitor the plastic every 3 minutes to ensure it is heating/melting evenly | ||
# when plastic is mostly melted, add glass, using pliers to grip the pan. swirl glass around so it distributes evenly | |||
# | # | ||
# | # | ||
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==Shutdown== | ==Shutdown== | ||
# turn off hot plate | |||
# let mixed composite sit and cool for 10-15 minutes | |||
# unplug hot plate and turn off fume hood | |||
gallery{{ | |||
|width=180 | |||
|height=135 | |||
|lines=1 | |||
|Image: melt pan grip.jpg|Pan grip | |||
|Image: Hot plate setup.jpg|Hot plate setup | |||
|Image: TC touching pan.jpg|Thermocouple position | |||
}} | |||
[[Category:MOST methods]] | [[Category:MOST methods]] |
Revision as of 12:44, 20 October 2019
Introduction
polymer and glass have very different particle sizes (glass powder <44 micron, polymer ~5mm diameter) these particles will not mix evenly unless the polymer melts
Safety
- small particle size of glass powder poses a health hazard-- operate in fume hood if possible, wear safety glasses and respirator.
Equipment or Bill of Materials
- MG200 recycled soda-lime glass powder, by Vitro Minerals
- crushed polypropylene stored in a closed, airtight plastic bag
- respirator
- ANSI Z87.1+ certified safety glasses with side shield
- fume hood
- 2 cups for more careful massing of samples
- several containers with closable lids (30-100 ml volume)
- spoon for adding small amounts of glass powder
- aluminum baking pan for quick heating
- 2 sheets of aluminum foil (12x12 in approx)
- heat-resistant gloves
- pliers
- timer of some sort
Calibration & Tolerances
- zero balance w/ empty container before each measurement
- tolerance of MyWeigh iM01 balance is 1000+/- 0.01 grams
- sample mass should fall within a tolerance of +/- 0.1g, preferrably within 0.01 or 0.02 for more precision
Operation & Procedure
- Ask Dr. Pearce for swipe access to DOW 901 (OSHE lab) if you don't already have access
- turn on fume hood MTU DOW 017 in DOW 901
- prepare sample compositions, starting with 100% polypropylene and increasing glass content in increments of 10% by weight, measured on a MyWeigh iM01 balance
- use spoon to scoop glass powder into cup, carefully measure out correct mass of glass powder into storage container on balance
- make sure to zero the balance with empty container before each measurement
- store measured glass for each composition in a correctly labeled plastic container with closed lid
- if containers of proper size are in short supply, use multiple smaller containers and label correctly
- email Paul Fraley (pdfraley@mtu.edu)
- take heat treat safety training
- furnace used: Thermolyne Furnatrol type 53600 (furnace # in U207)
- put plastic into container
- heat furnace
- put container into furnace with thermocouple wires under container
- monitor temperature every 5-10 minutes
I also tried mixing on a hot plate, which worked a little better
- get swipe access to M&M U108 if you don't have it already
- place hot plate under fume hood, plug into outlet.
- place glass container with cover on top onto hot plate, with thermocouple inside, touching bottom of glass container
- turn hot plate to 5 using the dial on the front
- measure out 10g glass powder and 90g PP for 10% glass composite
- when thermocouple reads 160C, start stopwatch, and add plastic to pan and swirl around until mostly level
- use the pliers to grip the pan, as it will be hot and may burn hands through gloves
- monitor the plastic every 3 minutes to ensure it is heating/melting evenly
- when plastic is mostly melted, add glass, using pliers to grip the pan. swirl glass around so it distributes evenly
Shutdown
- turn off hot plate
- let mixed composite sit and cool for 10-15 minutes
- unplug hot plate and turn off fume hood
gallery{{ |width=180 |height=135 |lines=1
|Image: melt pan grip.jpg|Pan grip |Image: Hot plate setup.jpg|Hot plate setup |Image: TC touching pan.jpg|Thermocouple position }}