Edit Talk

Polypropylene-glass composite mixing on hot plate :MOST

From Appropedia

Sunhusky.png Michigan Tech's Open Sustainability Technology Lab.

Wanted: Students to make a distributed future with solar-powered open-source 3-D printing and recycling.
Contact Dr. Joshua Pearce - Apply here

MOST: Projects & Publications, Methods, Lit. reviews, People, Sponsors, News
Updates: Twitter, YouTube


Sample photo caption.
You can put an abstract (a brief description of your method) here and the text you would copy into an article.

Introduction[edit | edit source]

This page outlines the process of mixing granulated recycled polypropylene with soda-lime recycled glass powder using a metal pan on a hot plate. This process results in a composite of glass particles in a polypropylene matrix. Melting of the plastic is required for an even mixture due to the large difference in particle size between the plastic (d~ 1-3mm) and glass (d < 100 micron).

Safety[edit | edit source]

  • safety glasses
  • wear long pants (natural fibers recommended but not required)
  • wear heat-resistant gloves when adding material to pan or mixing
  • some gloves still conduct heat through them, so it is better to use a handheld grip such as plyers to hold the pan with the hand not used for mixing.
  • turn on fume hood and use N95 dust mask when measuring/adding/mixing glass powder

Equipment or Bill of Materials[edit | edit source]

  1. safety glasses
  2. Thermolyne hot plate
  3. metal knife/spatula
  4. 7x2 inch round natural aluminum cake pan (non-coated)
  5. aluminum foil to cover top of pan
  6. heat resistant work gloves
  7. dust mask (when using glass)
  8. K-type thermocouple & reader
  9. polypropylene granulated from wood chipper
  10. glass powder
  11. timer of some sort
  12. ziploc bags to put material in once cooled

Calibration & Tolerances[edit | edit source]

Operation & Procedure[edit | edit source]

  1. turn on hot plate to 5 for heat setting.
  2. place glass container on hot plate with thermocouple touching bottom of container and watchglass on top, facing downward as lid.
  3. when thermocouple reads 160 deg Celsius, add polypropylene (PP) and glass powder
  • if the PP and glass are added at the same time and heated together, an oxidation reaction will likely occur
  1. for record-keeping purposes, time how long it takes to melt the plastic/composite.

Shutdown[edit | edit source]

  1. trun off hot plate and let it cool down
  2. also allow composite to cool down after use

References[edit | edit source]