Mesua ferrea L. seed oil-based hyperbranched shape memory polyurethanes: Effect of multifunctional component

被引：22

作者：

Kalita, Hemjyoti ^{[1
]}

Karak, Niranjan ^{[1
]}

机构：

[1] Tezpur Univ, Adv Polymer & Nanomat Lab, Dept Chem Sci, Tezpur 784028, Assam, India

来源：

POLYMER ENGINEERING AND SCIENCE | 2012年 / 52卷 / 11期

关键词：

CASTOR-OIL; MECHANICAL-PROPERTIES; PROPERTY; SEGMENTS; POLYOLS;

D O I：

10.1002/pen.23200

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The bio-based hyperbranched polyurethanes (HBPUs) have generated immense interest as advanced shape memory materials. In the present investigation, HBPUs were synthesized from poly(e-caprolactone)diol as a macroglycol, butanediol as a chain extender, monoglyceride of Mesua ferrea L. seed oil as a bio-based chain extender, triethanolamine as a branch-generating moiety (at different percentages), and toluene diisocyanate by a prepolymerization technique using A2 + B3 approach. The structure of the synthesized HBPU was characterized by different techniques. Nuclear magnetic resonance (proton) study indicated the formation of highly branched structure with degree of branching 0.9. The increment of thermal stability from 225 to 260 degrees C and melting point from 50 to 53.5 degrees C with the increase of triethanolamine content was observed. Tensile strength 48 MPa, elongation at break 614814%, impact resistance 0.80.95 m, and scratch hardness 26 kg increased with the increase of multifunctional moiety content from 0 to 5 wt%. The shape recovery ratio increased with the increase of multifunctional moiety content from 0.21 to 0.95. Thus, the studied HBPUs have the potential to be used as advanced thermoresponsive shape memory materials. POLYM. ENG. SCI., 2012. (C) 2012 Society of Plastics Engineers

引用

页码：2454 / 2461

页数：8

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