Polyphenolic resins prepared with maritime pine bark tannin and bulky-aldehydes
| Autor: | Danny E. García, Clément Lacoste, M. P. Laborie, Wolfgang G. Glasser, Antonio Pizzi |
|---|---|
| Přispěvatelé: | Freiburger Materialforschungszentrum, Albert-Ludwigs-Universität Freiburg, University of Freiburg [Freiburg], Virginia Polytechnic Institute and State University [Blacksburg], King Abdulaziz University, Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Degree of unsaturation Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Aldehyde 0104 chemical sciences [SPI]Engineering Sciences [physics] visual_art Polymer chemistry visual_art.visual_art_medium Organic chemistry Tannin Thermal stability Bark Reactivity (chemistry) Condensed tannin 0210 nano-technology Agronomy and Crop Science Alkyl ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Industrial Crops and Products Industrial Crops and Products, Elsevier, 2014, 62, pp.84-93. ⟨10.1016/j.indcrop.2014.08.010⟩ |
| ISSN: | 0926-6690 |
| Popis: | Tannin-based resins were prepared by acid-catalized polycondensation of maritime pine (Pinus pinaster Ait.) bark condensed tannin (CTs) and several aldehydes (A) in different molar ratio (CTs:A, 1.0:0.5; 1.0:1.0; 1.0:1.5) to assess the impact of the aldehyde chain structure on the novolac properties. The resin systems were characterized in term of reactivity, structural, morphological and thermal properties. Systematic relationships between aldehyde chain length and C-stage resin properties were established. When alkyl aldehydes with increasing chain lengths were used, reactivity with CTs decreased while C-stage resins exhibited systematic increases in bulk density, Tg and thermal stability. For the di-aldehydes and αβ-unsaturated aldehyde series, opposite trends were observed. This study on tannin-based novolacs demonstrates the potential to tailor aldehyde/tannin reactivity and C-stage resin properties in a systematic manner as a function of aldehyde chain length, functionality and unsaturation degree. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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