Flexible and compatible polymer composite blends based on polyurethane/sodium ionomer/lignin and their properties. Issue 29 (8th January 2020)

• Record Type: Journal Article
• Authors: Rukmanikrishnan, Balasubramanian; Kim, Sam Soo; Lee, Jaewoong
• Is Part Of: Journal of applied polymer science. Volume 137:Issue 29(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-01-08
• Subjects: lignin -- mechanicaL properties -- polyurethane -- sodium ionomer -- thermal properties -- water barrier properties; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.48885
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Polyurethane, sodium ionomer (Surlyn 8150), and lignin (PSL)‐based composite films were prepared by the solution casting method with different weight percentages of lignin. The relationships among the morphology, thermal resistance, mechanical, and dynamic mechanical properties for all composites were characterized. The structural interactions, microstructure, and optical properties of the composite were studied by Fourier transform infrared, scanning electron microscopy (SEM), X‐ray diffraction, and ultraviolet (UV) spectroscopy. The mechanical and UV absorbance properties of the composite films improved significantly with the addition of lignin particles. The tensile strength increased from 42.5 to 57.2 MPa. Dynamic mechanical analysis results show that the storage modulus of the composites increased and exhibited a single T g . PSL composite films show excellent water barrier properties, with improved surface hydrophobicity. SEM images revealed that a relatively uniform phase morphology and good interfacial compatibilization wereachieved. These results suggest that all of the composite films with PU, Na ionomers, and lignin materials exhibited good compatibility and miscibility. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48885. Abstract : Polyurethane‐, sodium ionomer‐, and lignin‐based composites prepared. The PSL‐3 composite completely blocked UVA and 90% of UVB rays. Thermal stability and char yield of the composites improved by the addition of lignin. The lignin can be enhance the water barrier properties Lignin slightly influenced the contact angle properties of PSL composite films.