1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Poly(p-phenylene-2,6-benzobisoxazole) - Zylon

  1. Aug 25, 2010 #1
    I am researching polymers used in making Ballistic Vests and Zylon, Poly(p-phenylene-2,6-benzobisoxazole), is one of the polymers chosen.

    Basic Information/ Structure:

    PBO is a thermosetting polymers however I cannot figure out how it can form cross-links or hydrogen bonds which make polymers thermosetting.

    So I was wondering how it forms crosslinks to make it a thermosetting polymer.

    And I also was wondering why it has such good flame retardancy, high limiting oxygen index and high decomposition temperature (650 C).

    I know that the oxygen and nitrogen in the oxazoline are partially negative which can act as hydrogen bonds acceptor but there are no positive hydrogen from what I can tell. I thought maybe the compound structure could change to form crosslinks or hydrogen bonds when heat treated but couldn't find information.

    Thank you.
    Last edited by a moderator: Apr 25, 2017
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted