Understanding Rheology of Thermoplastic Polymers
polymers’ flow behavior at temperatures above the glass transition temperature (for an amorphous material) or the melting point (for a semi-crystalline polymer). Melt viscosity is a constant at low shear rates or frequencies. The viscosity in this region is known as the zero shear, or Newtonian, viscosity ho. For low molecular weight polymers
Link to this page:
Documents from same domain
AAN013 Understanding Rheology of Thermoplastic Polymers Keywords: polymers-thermoplastics, adhesives, DMA, melt, glass transition, …
Issued January 2018 Page 1 of 17 TA Instruments What’s New in Thermal Advantage What’s New in Thermal Advantage Software V5.5.24 • Bug fix to repair instrument connection failure caused by Microsoft Windows updates on Windows 8.1
Discovery world’s finest line of Differential Scanning Calorimeters DISCOVER the WORLD’S FINEST line of DIFFERENTIAL SCANNING CALORIMETERS
9 xxxxxx xxxxxx TA Instruments invites you to experience the world’s finest line of Differential Scanning Calorimeters, the Discovery DSC 2500, DSC 250 and DSC 25.
TA039 Interpreting Unexpected Events and Transitions in DSC Results 1 TA039 Figure 1: Artificial DSC curve INTERPRETATION OF EVENTS AND TRANSITIONS
Polymers are formed by linking monomers through chemical reaction — called polymerization. You don’t end up with a unique molecule. i monomers chain of monomers i A → — (A-A-A )i/3— Homopolymer: all A identical • The most produced/used polymers are homopolymers of terminal alkenes. • Produced by radical polymerization.
• Originally natural polymers were used –Wood –Rubber –Cotton –Wool –Leather –Silk • Oldest known uses –Rubber balls used by Incas –Noah used pitch (a natural polymer) for the ark. AMSE 205 Spring ‘2016 Chapter 5 - 4 Polymer Composition Most polymers are hydrocarbons
polymers to heating. DSC can be used to study the melting of a crystalline polymer or the glass transition. The DSC set-up is composed of a measurement chamber and a computer. Two pans are heated in the measurement chamber. The sample pan contains the material being investigated. A second pan, which is typically empty, is used as a reference ...
Medical Device Polymers ... Used to make piezoelectric films that produce voltage or charge proportional in both amplitude and frequency to applied dynamic strain. Piezo films also change dimensions in response to applied voltage, again in direct proportion to …
Flammability of Polymers Introduction Most plastics are carbon-based materials and will burn and give off gases and smoke when ... One of the most widely used laboratory-scale techniques to quantify the smoke generation from burning materials is the Smoke Box test developed by the National Bureau of Standards (NBS). This test measures the ...
Polymers have been mainly used to control the drug release rate from the formulations. They are also used as taste masking agent, stabilizer and protective agent in oral drug delivery. Polymers can bind the particles of a solid dosage form and also change the …
1 POLYMERS Polymers are the high molecular weight compounds obtained by repeated union of simple molecules. (Monomers). Ex: Starch, Polyvinyl chloride, Polyethylene, Nylon 6, 6 and etc. The word ‘ Polymer’ is coined from two Greek words: poly means many and mer means unit or part. The term polymer is defined as very large molecules having high molecular mass.