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Is It Glass Filled or Glass Reinforced?
Here is how to tell the difference.
Columns Published: 11/28/2012
PBT & PET Polyester: Part 2 The Performance Factor
All things being equal, PET will outperform PBT mechanically and thermally. But the processor must dry the material properly and must understand the importance of mold temperature in achieving a degree of crystallinity that allows the natural advant...
Columns Published: 10/26/2012
PBT and PET Polyester: The Difference Crystallinity Makes
To properly understand the differences in performance between PET and PBT we need to compare apples to apples—the semi-crystalline forms of each polymer.
Columns Published: 9/29/2012
How Do You Like Your Acetal: Homopolymer or Copolymer?
Acetal materials have been a commercial option for more than 50 years.
Columns Published: 8/27/2012
Use MFR Cautiously with Filled Materials
If melt flow rate tests are used to evaluate the effect of processing on the average molecular weight of the polymer, the applicable rules must consider the contribution of the filler to the test result.
Columns Published: 7/30/2012
When It Comes to Nylon, Don’t Do the Math
Chemistry is seldom as simple as it looks. Polymer chemistry takes the complexity up a notch. Nylon chemistry is about much more than doing the math.
Columns Published: 6/26/2012
Density & Molecular Weight in Polyethylene
This so-called 'commodity' material is actually quite complex, making selecting of the right type a challenge.
Columns Published: 5/29/2012
Biopolymers: Time to Take A Deep Breath
Are we looking at all of the implications associated with developing this new 'crop' of polymers?
Columns Published: 4/26/2012
Working with Color Concentrates
Industry needs more development of enhanced-mixing screws.
Columns Published: 3/26/2012
Working with Color Concentrates
Perhaps the greatest difficulty involving the use of color concentrates is specifying them appropriately for the material to which they are being added.
Columns Published: 2/21/2012

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