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Orientation Time of Polymer Calculator

Orientation Time Formula:

\[ \tau_m = A \times \exp\left(\frac{E_a}{[R] \times T}\right) \]

1/s
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1. What is Orientation Time of Polymer?

Definition: Orientation time is a measure of the ease of uncoiling polymer chains under applied stress or temperature.

Purpose: It helps materials scientists and engineers understand polymer behavior under different conditions for processing and application purposes.

2. How Does the Calculator Work?

The calculator uses the Arrhenius-type formula:

\[ \tau_m = A \times \exp\left(\frac{E_a}{[R] \times T}\right) \]

Where:

Explanation: The formula describes how orientation time depends exponentially on temperature and activation energy.

3. Importance of Orientation Time Calculation

Details: Understanding orientation time helps predict polymer processing behavior, mechanical properties, and relaxation characteristics.

4. Using the Calculator

Tips: Enter the pre-exponential factor, activation energy in joules, and temperature in kelvin. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the physical meaning of orientation time?
A: It represents the characteristic time for polymer chains to align under stress or temperature.

Q2: How is activation energy determined?
A: Typically through rheological measurements at different temperatures.

Q3: What's a typical range for pre-exponential factor?
A: For polymers, it often ranges from 10^-12 to 10^-6 1/s depending on the material.

Q4: Why is temperature in Kelvin?
A: The Arrhenius equation requires absolute temperature to properly describe the exponential relationship.

Q5: How does orientation time relate to polymer processing?
A: It helps determine optimal processing conditions like extrusion temperatures and drawing rates.

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