What is the Tg of UHMWPE?
The glass transition temperature of ultra-high molecular weight polyethylene (UHMWPE) is -80C.
Can UHMW be thermoformed?
Ultra High Molecular Weight is the secret of this polymer’s unique properties. UHMW-PE cannot be transformed and molded by conventional plastic processing techniques (injection molding, blow molding or thermoforming).
Is HDPE self lubricating?
It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant to abrasion than carbon steel.
Is UHMWPE stronger than HDPE?
UHMW also has excellent resistance to stress and cracking, and the material has a low coefficient of friction (UHMW is self-lubricating). HDPE (High Density Polyethylene) has a somewhat lower tensile strength than UHMW. It possesses excellent chemical resistance and low moisture absorption.
How do you form UHMWPE?
How to Bend UHMW
- Place the UHMW plastic on a surface that will not melt at 300 degrees.
- Position a heat pipe where you need to create a bend.
- Remove the heat pipe once the plastic softens.
- Grip the plastic on both sides of the heated surface where the plastic remains solid white.
Is Uhmwpe self-lubricating?
Self-lubrication The unique molecular structure of UHMW polymers results in a self-lubricating material which exhibits excellent wear and abrasion properties as well as adding extremely high impact strength.
Can you weld Uhmwpe?
Yes, UHMW can be welded. Virgin UHMW is preferable but factory regrind is also weldable. Some UHMW with silicone and other additives is not weldable. The welding rod that you should use is 3/16” HDPE part number 46030.
What is the glass transition temperature for polyethylene?
Glass Transition Temperature Values of Several Plastics Polymer Name Min Value (°C) Max Value (°C) LDPE – Low Density Polyethylene -110.0 -110.0 LLDPE – Linear Low Density Polyethylene -110.0 -110.0 PA 11 – (Polyamide 11) 30% Glass fiber r 35.0 45.0 PA 11, Conductive 35.0 45.0
What does the transition temperature of glass stand for?
Glass Transition Temperature What does Tg stand for? When an amorphous polymer is heated, the temperature at which the polymer structure turns “viscous liquid or rubbery” is called the Glass Transition Temperature, Tg.
Why is the transition from glass to rubber important?
The transition from the glass to the rubber-like state is an important feature of polymer behavior, marking a region of dramatic changes in the physical properties, such as hardness and elasticity.