1、Thermal Transitions of Homopolymers: Glass Transition & Melting Point

Literature values for the glass transition temperature, (Tg), and melting temperature, (Tm), are given for the more common homopolymers.

2、Physicochemical Properties of Poly

The glass transition onset temperature of polyvinyl acetate is 38 °C, so as the substitution ratio of the vinyl acetate moiety increases, the glass transition temperature of the polymer approaches the glass transition temperature of polyvinyl acetate.

3、DYNAMIC MECHANICAL PROPERTIES OF POLYVINYL ACETATE IN SHEAR IN THE

DYNAMIC MECHANICAL PROPERTIES OF POLYVINYL ACETATE IN SHEAR IN THE GLASS TRANSITION TEMPERATURE RANGE

4、Glass Transition Temperature of Polymers and Plastics

Find the glass transition temperature values for different polymers and plastics in both degrees Celsius and degrees Fahrenheit.

5、Slow dynamics in thermal expansion of polyvinyl acetate thin

The experimental observation of an unusual thickness change in polyvinyl acetate (PVAc) thin films during the temperature cycle across the glass transition temperature (Tg, ~31 °C) is...

Polyvinyl acetate: Properties, Production process and Uses

The glass transition temperature Tc of PVAc varies with the molecular weight. For example, Tc = 17°C at the molecular weight of 15,000, and Tc = 2°C at the molecular weight of 104,000. PVAc is insoluble in water and only slightly swells in water. PVAc emulsion is commonly known as white latex.

Segmental mobility and glass transition of poly(ethylene

New extrapolated Tg and fragility values are proposed for PE. Fragility and cooperativity are not governed by the same macromolecular properties. The segmental dynamics of amorphous poly (ethylene-vinyl acetate) copolymers (from PVAc to EVA50) were studied.

Dynamical Heterogeneity near Glass Transition Temperature under Shear

X-ray photon correlation spectroscopy was utilized to study the dynamics of polyvinyl acetate with tracer particles near its glass transition temperature, to determine the local shear rate from the anisotropic behavior of the time autocorrelation function and to calculate the dynamical heterogeneity using higher-order correlation function.

Glass Transition Temperature (Tg) of Plastics

Find out more on Glass Transition Temperature (Tg), values for different plastics and its significance for making the right selection for your end applications.

Polyvinyl acetate glass transition temperature

Polyvinyl acetate is also a thermoplastic, but with a glass transition temperature of 28°C and completely amorphous stmcture. [Pg.346] Here the values are nearly constant up to an amount of 50 wt% vinyl acetate. Then the glass transition temperature increases steadily.

In the vast realm of modern materials science, polyvinyl acetate (PVAc) has become an indispensable material due to its unique properties and widespread applications. As a member of the plastic family, it plays a critical role in numerous engineering fields. Among its physical properties, the glass transition temperature (Tg) of polyvinyl acetate is a key indicator that significantly influences the understanding of its performance.

The glass transition temperature represents the temperature point at which a polymer transitions from a rubbery state to a glassy state, typically measured in degrees Celsius. At this temperature, the material undergoes a transformation from a soft, pliable state to a hard, rigid condition. This transition not only affects mechanical properties but also has profound implications for thermal stability, chemical resistance, and the selection of processing methods.

As a common thermoplastic, polyvinyl acetate exhibits a glass transition temperature ranging from 80°C to 120°C. Within this range, the material retains flowability when exposed to temperatures above Tg, while cooling below Tg causes it to shift from a malleable to a brittle state. This characteristic offers flexibility in manufacturing processes and broadens its applicability across specific uses.

Tg is not the sole determinant of polyvinyl acetate’s properties. It interrelates with other critical attributes, such as heat resistance, cold resistance, impact strength, and chemical stability. For instance, a higher Tg enhances thermal stability, enabling the material to maintain integrity at elevated temperatures, whereas a lower Tg improves impact resistance and toughness, reducing the risk of fracture under stress.

In practical applications, the glass transition temperature dictates operational conditions. For environments requiring high-temperature heating or rapid cooling, polyvinyl acetate with a higher Tg ensures mechanical and chemical stability under extreme conditions. Conversely, scenarios involving frequent temperature fluctuations or significant impact benefit from materials with a lower Tg, which adapt better to such demands.

Beyond industrial applications, Tg serves as a vital reference for developing novel materials. By modifying molecular structures or blending with other polymers, scientists can engineer polyvinyl acetate variants with tailored Tg values to meet specific performance needs. Such interdisciplinary collaboration drives innovation, contributing to societal advancements.

The glass transition temperature of polyvinyl acetate is a multifaceted concept, influencing its performance, application potential, and future development. With ongoing technological progress and material research, it is poised to inspire further breakthroughs. As a quintessential example, polyvinyl acetate will continue to play a pivotal role in scientific exploration and technological evolution.