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.
PE properties can be adjusted either by changing the molecular weight or by altering the density. While this increases the possible combinations of properties, it also requires that the specification for the material be precise.
Don’t be afraid to increase mold temperature to improve part quality when making PC parts. Take a look at a few examples here.
An often overlooked factor in optimizing the ductility of PC is the rate at which the polymer is cooled in the mold.
In the final part of this five-installment series, we bring DMA to a practical level using the results for glass-filled nylon.
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.