Poly(L-lactide) macrodiols (HOPLLAOH): Influence of linear alkyl diols as initiators: Synthesis and characterization |
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| Authors: | José E Báez Plácido Galindo-Iranzo Ángel Marcos-Fernández |
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| Institution: | 1. Department of Chemistry, University of Guanajuato (UG), Guanajuato, Mexicojebaez@ugto.mx;3. Department of Structure, Energy and Chemical Reactivity, Institute of Physical Chemistry “Rocasolano,” the Spanish National Research Council (CSIC), Madrid, Spain;4. Department of Polymer Physics, Elastomers and Applications Energy, Institute of Polymer Science and Technology (ICTP) the Spanish National Research Council (CSIC), Madrid, Spain |
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| Abstract: | A series of α,ω-hydroxy telechelic poly(L-lactide)s (HOPLLAOHs) were synthesized by ring-opening polymerization (ROP) of L-lactide (L-LA) using tin octoate Sn(Oct)2] as catalyst and a family of linear alkyl diols as initiators HO–CH2]m–OH, where m = 2, 4, 6, 8, 10, and 12]. A systematic analysis of these HOPLLAOHs species in terms of their thermal properties was realized by DSC. In this sense, the linear alkyl group had an important influence on the glass transition temperature (Tg); a relatively high content of alkyl group on the HOPLLAOH increased the flexibility of the polyester, evidenced by a value of Tg inversely proportional to the weight percent of the alkyl group. Besides, the alkyl groups had an effect on the crystallization temperature (Tc), melting temperature (Tm), and crystallinity (xi). Additionally, HOPLLAOHs were characterized by 1H and 13C NMR, FT-IR, MALDI-TOF, and GPC. |
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| Keywords: | Alkyl group DSC glass transition temperature macrodiol poly(L-lactide) |
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