Sequential Interpenetrating Polymer Networks Produced from Vegetable Oil Based Polyurethane and Poly(methyl methacrylate)

• Published in: Biomacromolecules Vol. 9; no. 8; pp. 2221 - 2229
• Main Authors: Kong, Xiaohua, Narine, Suresh S
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.08.2008
• Subjects: Applied sciences; Biocompatible Materials - chemistry; Calorimetry, Differential Scanning - methods; Equipment Design; Exact sciences and technology; Materials Testing; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Organic polymers; Physicochemistry of polymers; Plant Oils - metabolism; Plastics; Polymerization; Polymers - chemistry; Polymethyl Methacrylate - chemistry; Polyurethanes - chemistry; Preparation, kinetics, thermodynamics, mechanism and catalysts; Stress, Mechanical; Tensile Strength; Thermodynamics; Canola oil; Methyl methacrylate polymer; Mechanical properties; Composition effect; Experimental study; Polyaddition; Interpenetrating polymer network; Free radical polymerization; Dynamic mechanical properties; Morphology; Preparation; Polyurethane; Plant origin; Microheterogeneity; Successive reaction
• ISSN: 1525-7797; 1526-4602
• DOI: 10.1021/bm800335x

Sequential interpenetrating polymer networks (IPNs) were prepared using polyurethane produced from a canola oil based polyol with primary terminal functional groups and poly(methyl methacrylate) (PMMA). The properties of the material were studied and compared to the IPNs made from commercial castor oil using dynamic mechanical analysis, differential scanning calorimetry, as well as tensile measurements. The morphology of the IPNs was investigated using scanning electron microscopy and transmission electron microscopy. The chemical diversity of the starting materials allowed the evaluation of the effects of dangling chains and graftings on the properties of the IPNs. The polymerization process of canola oil based IPNs was accelerated because of the utilization of polyol with primary functional groups, which efficiently lessened the effect of dangling chains and yielded a higher degree of phase mixing. The mechanical properties of canola oil based IPNs containing more than 75 wt % PMMA were comparable to the corresponding castor oil based IPNs; both were superior to those of the constituent polymers due to the finely divided rubber and plastic combination structures in these IPNs. However, when PMMA content was less than 65 wt %, canola oil based IPNs exhibited a typical mechanical behavior of rigid plastics, whereas castor oil based IPNs showed a typical mechanical behavior of soft rubber. It is proposed that these new IPN materials with high performance prepared from alternative renewable resources can prove to be valuable substitutes for existing materials in various applications.