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Siloxane surfactant‐modified clay and its effect in reinforcing the laminate of polymethylsilsesquioxane
Author(s) -
Li BaiYu,
Ma Jun,
Liu HaiYun,
Guo XingLin,
Zhang XiaoLi,
Xu Jian
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23018
Subject(s) - materials science , composite material , pulmonary surfactant , polymer , montmorillonite , nanocomposite , compatibility (geochemistry) , siloxane , thermal stability , exfoliation joint , chemical engineering , nanotechnology , engineering , graphene
To achieve good compatibility between clay layers and siloxane polymer, polymethylsilsesquioxane (PMSQ), montmorillonite was modified by a novel siloxane surfactant with M̄ w = 1900 and then environmentally friendly solution‐compounded with PMSQ to prepare glass fiber laminates. Transmission electronic microscope shows the orderly, exfoliated structure of the modified clay in PMSQ matrix; scanning electronic microscope demonstrates the fine dispersion of the clay layers in the matrix because of the good compatibility between the grafted surfactant and the matrix. Both the modified clay and its nanocomposite indicate much improved thermal stability. By incorporation of merely 0.3 wt % of the clay, the flexural modulus and strengths of fiber/PMSQ laminate are increased by 21 and 62%, respectively. This study illuminates the importance of the compatibility of the grafted siloxane surfactant with the matrix polymer in achieving both exfoliation and dispersion of clay as well as ideal mechanical properties for silicone‐based polymers. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3974–3980, 2006