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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Doze on October 23, 2011, 09:51:22 PM

Title: Why does the benzene ring in the structure of P.E.T cause chain stiffness??
Post by: Doze on October 23, 2011, 09:51:22 PM

This is really bothering me, since I have to relate this to one of its properties.


Help would be much appreciated.
 
Thank you.

Title: Re: Why does the benzene ring in the structure of P.E.T cause chain stiffness??
Post by: fledarmus on October 24, 2011, 07:29:03 AM

compared to what?

Title: Re: Why does the benzene ring in the structure of P.E.T cause chain stiffness??
Post by: Honclbrif on October 24, 2011, 09:57:06 AM

Think about the bonding in benzene compared to, say, an aliphatic chain.

Title: Re: Why does the benzene ring in the structure of P.E.T cause chain stiffness??
Post by: fledarmus on October 24, 2011, 10:45:26 AM

Quote from: Honclbrif on October 24, 2011, 09:57:06 AM

Think about the bonding in benzene compared to, say, an aliphatic chain.

Or better yet, build a model of the repeat group in PET and of an alkyl chain of the same length. See which one is more flexible.

Title: Re: Why does the benzene ring in the structure of P.E.T cause chain stiffness??
Post by: Kadabrium on October 25, 2011, 03:48:20 AM

maybe π-πinteraction between chains constricted them