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Three-Dimensional Particle Shape Analysis Using X-ray Computed Tomography: Experimental Procedure and Analysis Algorithms for Metal Powders

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Quantitative Analysis of TPU Microstructure and Performance Optimization across Various Processing Conditions.

Guangzhi Jin^1,2, Yuzhen Gong^1,2, Jun Wang^1,2

¹State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|November 1, 2024

Summary

This summary is machine-generated.

Processing conditions significantly impact thermoplastic polyurethane (TPU) properties. Adjusting molding and heat treatment effectively controls TPU microstructure and performance for advanced applications.

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Area of Science:

Materials Science
Polymer Science
Engineering Polymers

Background:

Thermoplastic polyurethane (TPU) is a versatile polymer used in diverse industries.
While TPU microstructures and properties are studied, processing condition effects are less understood.
Understanding processing-TPU relationships is key for material optimization.

Purpose of the Study:

To investigate the influence of processing conditions on TPU microstructure and mechanical properties.
To analyze the effects of compression molding, injection molding, and post-processing heat treatment.
To correlate microstructural changes with macroscopic performance variations.

Main Methods:

TPU samples with varying hard segment content were prepared.
Compression molding at 205 °C and injection molding at 205-220 °C were employed.
Samples underwent heat treatment at 120 °C for 12 hours.

Main Results:

Injection molding at 205 °C yielded lower crystallinity and hydrogen bonding than compression molding.
Increased injection molding temperatures reduced microstructural parameters, affecting modulus and elongation.
Heat treatment improved microphase separation, enhancing mechanical properties beyond compression-molded samples.

Conclusions:

Processing conditions critically influence TPU's hydrogen bonding, crystallinity, and morphology.
Heat treatment effectively enhances microphase separation and tailors mechanical performance.
Adjusting processing parameters offers a viable strategy for developing high-performance TPUs.