crystallization kinetic: PP vs. PBT; which one is faster?

[DHT83]

My guess is PBT will be the faster crystallizing one but I can't seem to find a concrete proof for this. What do you all think? Thanks in advance for your comments!

 

[patprimmer]

Cycle time is a reasonable eay to test indicator and PBT cycles faster than PP.

My only qualifier is PBT continues to further crystallize for quite a long time as indicated by post moulding shrinkage.

Regards
Pat
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[Demon3]

PP requires the most energy of any polymer to melt and then crystallise so I would expect it to be slower than PBT as Pat indicated. Of course either can be nucleated using additives and that could change the speed of crystallization.

Chris DeArmitt PhD FRSC CChem

 

[DHT83]

Thanks Pat and Chris!