Synthesis and properties of novel star-shaped polyesters based on l-lactide and castor oil
The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on l -lactide and castor oil using the trifluoromethanesu...
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| Published in: | Polymer bulletin (Berlin, Germany) Vol. 70; no. 6; pp. 1723 - 1738 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
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01-06-2013
Springer Springer Nature B.V |
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| Abstract | The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on
l
-lactide and castor oil using the trifluoromethanesulfonic acid as a catalyst. FTIR and
1
H NMR spectroscopy measurements were used to estimate the molecular structure of the novel materials. The polyester polyol was synthesized by ‘‘core-first” method which involves a polymerization of
l
-lactide by using a castor oil as multifunctional initiator. Molar masses estimated by gel permeation chromatography and vapor pressure osmometry were in good correlation with calculated values based on hydroxyl number of obtained polymers. DSC measurements confirmed high crystallinity degree of the synthesized material. It was assessed that the molar masses of obtained polymers-influenced glass transition temperature significantly. The thermal stability was investigated by TG analysis, and the results have shown the dependence of weight loss on the arm length of the star-shaped polyesters. The thermal stability of star-shaped polyesters significantly decreased with degradation of polyester polyol obtained in acid solution. |
|---|---|
| AbstractList | The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on l-lactide and castor oil using the trifluoromethanesulfonic acid as a catalyst. FTIR and 1H NMR spectroscopy measurements were used to estimate the molecular structure of the novel materials. The polyester polyol was synthesized by ‘‘core-first” method which involves a polymerization of l-lactide by using a castor oil as multifunctional initiator. Molar masses estimated by gel permeation chromatography and vapor pressure osmometry were in good correlation with calculated values based on hydroxyl number of obtained polymers. DSC measurements confirmed high crystallinity degree of the synthesized material. It was assessed that the molar masses of obtained polymers-influenced glass transition temperature significantly. The thermal stability was investigated by TG analysis, and the results have shown the dependence of weight loss on the arm length of the star-shaped polyesters. The thermal stability of star-shaped polyesters significantly decreased with degradation of polyester polyol obtained in acid solution. The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on l -lactide and castor oil using the trifluoromethanesulfonic acid as a catalyst. FTIR and 1 H NMR spectroscopy measurements were used to estimate the molecular structure of the novel materials. The polyester polyol was synthesized by ‘‘core-first” method which involves a polymerization of l -lactide by using a castor oil as multifunctional initiator. Molar masses estimated by gel permeation chromatography and vapor pressure osmometry were in good correlation with calculated values based on hydroxyl number of obtained polymers. DSC measurements confirmed high crystallinity degree of the synthesized material. It was assessed that the molar masses of obtained polymers-influenced glass transition temperature significantly. The thermal stability was investigated by TG analysis, and the results have shown the dependence of weight loss on the arm length of the star-shaped polyesters. The thermal stability of star-shaped polyesters significantly decreased with degradation of polyester polyol obtained in acid solution. |
| Author | Budinski-Simendić, Jaroslava K. Ristić, Ivan S. Marinović-Cincović, Milena Tanasić, Ljiljana M. Cakić, Suzana M. |
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| CitedBy_id | crossref_primary_10_3390_jfb11020030 crossref_primary_10_1007_s00289_018_2656_8 crossref_primary_10_1016_j_cej_2021_133347 crossref_primary_10_1007_s10965_015_0719_1 crossref_primary_10_1016_j_progpolymsci_2018_10_004 crossref_primary_10_1007_s00289_017_2197_6 crossref_primary_10_1021_acs_biomac_5b00923 crossref_primary_10_1002_app_42213 crossref_primary_10_1007_s00289_015_1474_5 crossref_primary_10_1021_acs_macromol_5b02613 crossref_primary_10_1038_pj_2016_11 crossref_primary_10_1016_j_matlet_2014_06_133 |
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| Issue | 6 |
| Keywords | Thermal properties Poly(lactide) Cationic polymerization Star-shaped polyester Branched polymer Molecular structure Ester polymer Lactone Vegetable oil Condensation polymerization Crystallinity Experimental study Glass transition temperature Thermal stability Castor oil Aliphatic polymer Preparation Property structure relationship Polyol |
| Language | English |
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| SubjectTerms | Acids Applied sciences Biomedical materials Castor oil Characterization and Evaluation of Materials Chemistry Chemistry and Materials Science Chromatography Complex Fluids and Microfluidics Crystallization Exact sciences and technology Fourier transforms Gel chromatography Glass transition temperature Molecular structure NMR spectroscopy Organic Chemistry Organic polymers Original Paper Physical Chemistry Physicochemistry of polymers Polycondensation Polyester resins Polyesters Polymer Sciences Polymerization Polymers Polyols Preparation, kinetics, thermodynamics, mechanism and catalysts Soft and Granular Matter Software Stability analysis Thermal stability Topology Triflic acid Vapor pressure Weight loss |
| Title | Synthesis and properties of novel star-shaped polyesters based on l-lactide and castor oil |
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