Polymer Characterization: Density

To determine the density of polymer samples by creating a gradient of two liquids of different densities and measuring the height at which the sample settles.

Isotactic and syndiotactic polymers have a regular pattern in the placement of side groups, making them more crystalline and denser, while atactic polymers have random placement, making them less dense and more amorphous.

Isotactic polymers can be used to make fibers and clothing, while syndiotactic polymers might be utilized in high-strength applications such as screw cap tops for soft drinks.

<p>High pressure reduces the volume of polymers, leading to an increase in density due to their compressibility.</p> Signup and view all the answers

<p>The high density of PTFE is attributed to its cohesive chemical structure, resulting in strong intermolecular forces that allow chains to pack closely together.</p> Signup and view all the answers

<p>Their crystalline nature makes them suitable for applications requiring robust mechanical properties, such as fibers, clothing, and high-strength applications.</p> Signup and view all the answers

<p>inverse proportionality between mass and volume</p> Signup and view all the answers

<p>Because density values vary with temperature</p> Signup and view all the answers

<p>To measure the volume of pores and interparticle volumes</p> Signup and view all the answers

<p>thermal expansion, which leads to a decrease in density</p> Signup and view all the answers

<p>it provides a standardized and consistent unit of measurement</p> Signup and view all the answers

<p>convenience, as it is often more practical for everyday measurements</p> Signup and view all the answers