Polypropylene

Discussion in 'Chemistry' started by timojin, Aug 24, 2015.

  1. timojin Valued Senior Member

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    Any body familiar with the Transition temperature between crystallite and spherulite
     
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  3. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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    I do not believe there is a transition temperature for that, I think the only way to change the structure from one to the other is to do a remelt. You can get spherulites by cooling a melt without a temperature gradient or by adding nucleation sites. By the way spherulites are mostly crystalline.
     
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  5. timojin Valued Senior Member

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    Well I do believe the first step an amorphous texture which you can obtained as you quench the melt , then chrystalite are formed , then the aggregate are formed with boundary, and in between the boundary , there is an amorphous site which is susceptible to oxidation then the spherulite area
     
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  7. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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    OK. So was your question answered?
     
  8. timojin Valued Senior Member

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    By whom and when ? I have not seen any temperature value
     
  9. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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    By me at 7:58am. Since my answer was there is no transition temperature the temperature value is null.
     
  10. timojin Valued Senior Member

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    I am not sure if you are familiar with polypropylene, but thanks for the reply.
    But for your information an amorphous film produced on a surface with time it will convert itself into spherulitic texture .
     
  11. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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    I am somewhat familiar with polypropylene.
    That's nice but your question was not about a transition from an amorphous state. Is that now what your question is? I am not a mind reader.
     
  12. timojin Valued Senior Member

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    Sorry guy for not posting proper question.
     
  13. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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    I don't care about proper (whatever that is suppose to mean) a clear question would be helpful.
    It now sounds like you are asking what the devitrification temperature is for amorphous polypropylene. Is that your question?
     
  14. timojin Valued Senior Member

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    It is getting confusing .
    Let me put it this way Melt 160 C -- Chrystlite ( small Christal formation ) --- Spherulite formation 100 C. you have three stages
     
  15. origin In a democracy you deserve the leaders you elect. Valued Senior Member

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