A polymer closely related to PET is PBT, which is made from terephthalic acid and butane-1,4-diol.(a) Propose a structure for PBT and write the condensed formula for the structure.(b) What does PBT stand for? That is, what do you expect the trivial name of PBT to be?(c) Would you expect PBT to have a higher or lower melting point than PET? Justify your answer.(d) PBT, rather than PET, is used in molding because it crystallizes faster. Explain why PBT crystallizes more quickly than PET.
A polymer closely related to PET is PBT, which is made from terephthalic acid and butane-1,4-diol.(a) Propose a structure for PBT and write the condensed formula for the structure.(b) What does PBT stand for? That is, what do you expect the trivial name of PBT to be?(c) Would you expect PBT to have a higher or lower melting point than PET? Justify your answer.(d) PBT, rather than PET, is used in molding because it crystallizes faster. Explain why PBT crystallizes more quickly than PET.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter23: Polymeric Materials And Soft Condensed Matter
Section: Chapter Questions
Problem 10P
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(a) Propose a structure for PBT and write the condensed formula for the structure.
(b) What does PBT stand for? That is, what do you expect the trivial name of PBT to be?
(c) Would you expect PBT to have a higher or lower melting point than PET? Justify your answer.
(d) PBT, rather than PET, is used in molding because it crystallizes faster. Explain why PBT crystallizes more quickly than PET.
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