What is the glass transition temperature of natural rubber?
about −70°C
Properties of natural rubber Glass transition temperature (Tg) of NR is about −70°C and its structure is cis-l,4-poryisoprene(2-methyl-1,3-butadiene).
What is the glass transition temperature of acrylic?
Product Properties The glass transition temperature for ACRYLITE® premium acrylic sheet ranges between 90-105°C (194-221°F). The glass transition temperature for ACRYLITE® cast acrylic sheet ranges between 100-115°C (212-239°F).
What polymers have glass transition temperature?
Common examples of amorphous polymers include hard, rigid materials such as polystyrene (PS) and polymethyl methacrylate (PMMA), which are used in their glassy state and well below their glass transition temperatures. Semi-crystalline polymers have highly ordered crystalline regions along with amorphous regions.
What is the glass transition temperature for latex paint?
One of the clearest examples of this is commercial latex paint. Latex-based paints typically have glass transition temperatures between 10° to 20°C (50° and 70°F). When they are applied within this temperature range, they form a superior film, have good adhesion and don’t show any surface defects.
How to determine glass transition temperature of plastics?
The most usual test method to determine Glass Transition Temperature of plastics is ASTM E1356. This test method covers the assignment of the glass transition temperatures of materials using differential scanning calorimetry or differential thermal analysis.
What is the transition from glass to rubber-like state?
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.
Why do polymers change from glass to rubber?
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. At Tg, changes in hardness, volume, percent elongation to break and Young’s modulus of solids are mainly seen.