Synthesis and characterisation of uniform bisester tetra-amide segments

Krijgsman, J. and Husken, D. and Gaymans, R.J. (2003) Synthesis and characterisation of uniform bisester tetra-amide segments. Polymer, 44 (23). pp. 7043-7053. ISSN 0032-3861

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Abstract:	The synthesis and characterisation of a new type of high melting and fast crystallising amide units that can be used for copolymerisation have been studied. These bisester tetra-amide or TxTxT-dimethyl segments (T is a terephthalic unit and x=(CH2)n (n=2–8)) can be synthesised in a two-step reaction. These segments are based on two-and-a-half repeating units of nylon-x,T. The structure of the products was confirmed by NMR. The melting temperature and enthalpy of xTx-diamine and TxTxT-dimethyl and -diphenyl were determined by DSC. The melting temperature increases with decreasing length of x. For odd x the melting temperature is lower. The melting temperature and enthalpy of the products decrease with decreasing purity.
Item Type:	Article
Copyright:	© 2003 Elsevier
Faculty:	Science and Technology (TNW)
Research Group:	Polymer Chemistry and BioMaterials (PBM)
Link to this item:	http://purl.utwente.nl/publications/75195
Official URL:	http://dx.doi.org/10.1016/S0032-3861(03)00681-5
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