Q
glass transition temperature of polyester
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The glass transition temperature (Tg) of polyester varies depending on its structural makeup, but it generally falls within the range of 70°C to 80°C for most common types. Polyester is a synthetic polymer made by condensation polymerization of ethylene glycol and terephthalic acid or its derivatives. The Tg is a critical parameter that signifies the temperature at which polyester transitions from a hard, glassy state to a soft, rubbery state. This transition impacts the material's mechanical properties, such as stiffness and ductility, and is crucial for applications where thermal resistance and mechanical performance are important. Factors like molecular weight, copolymerization, and the presence of plasticizers can influence the Tg of polyester, allowing it to be tailored for specific applications ranging from textiles to automotive parts.
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