PMID- 19105903
OWN - NLM
STAT- MEDLINE
DCOM- 20090224
LR  - 20121115
IS  - 0920-5063 (Print)
IS  - 0920-5063 (Linking)
VI  - 20
IP  - 1
DP  - 2009
TI  - Preparation and hydrolytic degradation of poly(hexylene terephthalate-co-lactide) 
      co-polyesters from melting polycondensation.
PG  - 99-114
LID - 10.1163/156856208X393527 [doi]
AB  - To obtain a biodegradable polymer material with satisfactory thermal properties, 
      higher elongation and modulus of elasticity, a series of biodegradable 
      aliphatic/aromatic co-polyesters, poly(hexylene terephthalate-co-lactide) (PHTL), 
      was synthesized via melt polycondensation from dimethyl terephthalate (DMT), 
      1,6-hexanediol (HDO) and oligo(lactic acid) (OLA) in the presence of titanium 
      (IV) butoxide. The resulting co-polyesters were characterized by proton nuclear 
      magnetic resonance ((1)H-NMR), differential scanning calorimetry, 
      thermogravimetry and wide-angle X-ray scattering, and their melting temperature, 
      melting heat of fusion, glass-transition temperature (T(g)) and thermal 
      decomposition temperature (T(m)) (1.5 wt%) were obtained. Only one T(g) and two 
      T(m) values were observed for all samples, and were found to decrease gradually 
      with increase of lactide moieties. By using the relative integral areas of the 
      dyad peaks in the (1)H-NMR spectrum of co-polyesters PHTL, the sequence lengths 
      of the hexylene terephthalate (n(HT)) units in the resultant co-polyesters are 
      3.5. The PHTL co-polyesters exhibited a pronounced hydrolytic degradability, 
      which increase with the content in lactide units. (1)H-NMR analysis of the 
      residue left by evaporation of the mother solution after hydrolytic degradation 
      revealed that the degradation products consisted mostly of lactide and hexylene 
      terephthalate blocks.
FAU - Su, Jiying
AU  - Su J
AD  - Institute of Polymer Materials, School of Materials Science and Engineering, 
      Nanchang University, Xuefu Road 999, Nanchang 330031, P. R. China.
FAU - Chen, Yiwang
AU  - Chen Y
FAU - Tan, Licheng
AU  - Tan L
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Biomater Sci Polym Ed
JT  - Journal of biomaterials science. Polymer edition
JID - 9007393
RN  - 0 (Dioxanes)
RN  - 0 (Phthalic Acids)
RN  - 0 (Polyesters)
RN  - 6S7NKZ40BQ (terephthalic acid)
RN  - 95-96-5 (dilactide)
SB  - IM
MH  - Dioxanes/*chemistry
MH  - Molecular Structure
MH  - Molecular Weight
MH  - Nuclear Magnetic Resonance, Biomolecular
MH  - Phase Transition
MH  - Phthalic Acids/*chemistry
MH  - Polyesters/*chemistry
MH  - Surface Properties
MH  - Temperature
EDAT- 2008/12/25 09:00
MHDA- 2009/02/25 09:00
CRDT- 2008/12/25 09:00
PHST- 2008/12/25 09:00 [entrez]
PHST- 2008/12/25 09:00 [pubmed]
PHST- 2009/02/25 09:00 [medline]
AID - 10.1163/156856208X393527 [doi]
PST - ppublish
SO  - J Biomater Sci Polym Ed. 2009;20(1):99-114. doi: 10.1163/156856208X393527.