TY - JOUR
T1 - A supramolecular polymer based on tweezer-type π?π stacking interactions
T2 - Molecular design for healability and enhanced toughness
AU - Burattini, Stefano
AU - Greenland, Barnaby W.
AU - Hayes, Wayne
AU - MacKay, Michael E.
AU - Rowan, Stuart J.
AU - Colquhoun, Howard M.
PY - 2011/1/11
Y1 - 2011/1/11
N2 - A new polyamide with tweezer-type dipyrenyl end-groups was successfully synthesized. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The synthesis of polyamine involved reaction of Jeffamine 400 with isophthaloyl dichloride in the presence of ca. 20 mol% of the aminomethyl-substituted tweezer-molecue to end-cap the chains and control the degree of polymerization. The MALDI-ToF mass spectrum of polyamide exhibited well resolved signals consistent with the production of bis end-capped chains containing up to three Jeffamine 400 segments. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The results show that blend has an enhanced ultimate tensile strength and greatly increased modulus of toughness and elongation.
AB - A new polyamide with tweezer-type dipyrenyl end-groups was successfully synthesized. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The synthesis of polyamine involved reaction of Jeffamine 400 with isophthaloyl dichloride in the presence of ca. 20 mol% of the aminomethyl-substituted tweezer-molecue to end-cap the chains and control the degree of polymerization. The MALDI-ToF mass spectrum of polyamide exhibited well resolved signals consistent with the production of bis end-capped chains containing up to three Jeffamine 400 segments. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The results show that blend has an enhanced ultimate tensile strength and greatly increased modulus of toughness and elongation.
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U2 - 10.1021/cm102963k
DO - 10.1021/cm102963k
M3 - Article
AN - SCOPUS:78751639709
VL - 23
SP - 6
EP - 8
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 1
ER -