Hydroxypropyl tannin from Pinus pinaster bark as polyol source in urethane chemistry

被引：33
|
作者：
Garcia, D. E. [1 ,2 ,3 ]
Glasser, W. G. [4 ]
Pizzi, A. [5 ,6 ]
Paczkowski, S. [1 ,2 ]
Laborie, M. -P. [1 ,2 ]
机构：
[1] Univ Freiburg, Freiburger Mat Forsch Zentrum FMF, D-79104 Freiburg, Germany
[2] Univ Freiburg, Chair Forest Biomat, D-79085 Freiburg, Germany
[3] Univ Concepcion, UDT, Area Prod Quim, Bio Bio, Chile
[4] Virginia Polytech Inst & State Univ, Dept Sustainable Biomat, Blacksburg, VA 24061 USA
[5] Univ Lorraine, Lab Etud & Rech Mat Bois LERMAB, F-88000 Epinal, France
[6] King Abdulaziz Univ, Jeddah 21413, Saudi Arabia
来源：
EUROPEAN POLYMER JOURNAL | 2015年 / 67卷
关键词：
Maritime pine; Condensed tannin; Urethane resins; Cast films; Hydroxypropylation; Tannin derivatization; BIODEGRADABLE POLYURETHANE MATERIALS; THERMAL-STABILITY; STARCH; DEGRADATION; FILMS; FOAMS;
D O I：
10.1016/j.eurpolymj.2015.03.039
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Novel thermosetting polyphenol-based polyurethane (PU) films were prepared using condensed tannin (CTs) and hydroxypropyl tannin derivatives (HPTs) from Pinus pinaster bark and diisocyanates. Four HPTs with a degree of substitution (DS) rising stepwise from 1 to 4 were crosslinked with either an aromatic (polymeric methylene diphenyl diisocyanate (pMDI)) or an aliphatic isocyanate (hexamethylene diisocyanate (HDI)). Chemical structure, moisture sorption, thermal, and morphological properties of the films were studied. Properties varies with NCO:OH ratio (0.5-4.0), DS, diisocyanate type, and cross-link density (CD). Partial tannin hydroxypropylation (DS 2, 3) based/films showed a flexible-type character in term of Young's modulus, elongation and tensile strain. Significant relationships were established between CD and physicochemical properties. HPTs constitute suitable macro building-block polyols for urethane chemistry. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：152 / 165
页数：14
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