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Published: 5/1/2019

Part 5: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
In the final part of this five-installment series, we bring DMA to a practical level using the results for glass-filled nylon.

Published: 4/1/2019

Part 4: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
The presentation of DMA data can sometimes frustrate users and discourage its adoption. Those unfamiliar with DMA should insist on receiving data relevant to the manner in which the part they are developing will be used.

Published: 3/11/2019

Heat Deflection Temperature vs. Dynamic Mechanical Analysis (Part 3)
DMA provides a rich and detailed picture of polymer performance, and it can be challenging to understand all the things that we can and should know about our materials. But the fact that it may be hard does not mean that it should not be attempted.

Published: 2/1/2019

PART 2 Heat Deflection Temperature vs. Dynamic Mechanical Analysis
Here’s a real-world example of a part failure demonstrating why DMA curves have more value than single-point data generated by HDT.  

Published: 1/1/2019

Part 1: Heat Deflection Temperature vs. Dynamic Mechanical Analysis
Does the industry need a better way of reporting the temperature-dependent behavior of plastics? With DMA, it already has one. But it’s been glacially slow to catch on.

Published: 11/30/2018

Part 11: A Processor's Most Important Job
It’s the processors job to ensure molded parts contain enough stabilizer to perform to the expectations of the end use.

Published: 10/30/2018

A Processor’s Most Important Job, Part 10: Fiber-Length Retention
Glass and carbon fibers are often used to increase material strength and modulus. To maintain these properties, the aspect ratio of these fibers must be maintained.

Published: 10/1/2018

A Processor's Most Important Job, Part 9: Avoid Molded-In Stress
How to establish molding conditions that minimize internal stress in a part.

Published: 8/28/2018

A Processor’s Most Important Job, Part 8: Molded-In Stress
How processing adjustments can control molded-in stress.

Published: 8/1/2018

A Processor's Most Important Job, Part 7: Reviewing Crystallinity
There are several process-related issues that influence crystallinity besides cooling rate. Let’s examine a few.