tailieunhanh - Báo cáo hóa học: " A solution blending route to ethylene propylene diene terpolymer/layered double hydroxide nanocomposites"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A solution blending route to ethylene propylene diene terpolymer/layered double hydroxide nanocomposites | Nanoscale Res Lett 2007 2 1-5 DOI s11671-006-9020-x NANO EXPRESS A solution blending route to ethylene propylene diene terpolymer layered double hydroxide nanocomposites H. Acharya S. K. Srivastava Anil K. Bhowmick Published online 27 October 2006 to the authors 2006 Abstract Ethylene propylene diene terpolymer EPDM MgAl layered double hydroxide LDH nanocomposites have been synthesized by solution intercalation using organically modified LDH DS-LDH . The molecular level dispersion of LDH nanolayers has been verified by the disappearance of basal XRD peak of DS-LDH in the composites. The internal structures of the nanocomposite with the dispersion nature of LDH particles in EPDM matrix have been studied by TEM and AFM. Thermogravimetric analysis TGA shows thermal stability of nanocomposites improved by 40 C when 10 weight loss was selected as point of comparison. The degradation for pure EPDM is faster above 380 C while in case of its nanocomposites it is much slower. Keywords Layered double hydroxide Nanocomposites Solution blending Introduction The recent research in polymer nanocomposite is focused on the use of layered double hydroxide as inorganic layered crystal for their wide application in catalysis hydrogenation reaction fire retardance stabilizer medical applications sorbent and ion H. Acharya S. K. Srivastava El Department of Chemistry Indian Institute of Technology Kharagpur West Bengal 721302 India e-mail sunit@ A. K. Bhowmick Rubber Technology Centre Indian Institute of Technology Kharagpur 721302 India exchangers 1 2 . These nanocomposites can be considered to be reinforced by the nanofiller and follow the various unique properties such as enhanced mechanical properties thermal stability improved gas barrier properties and reduced flammability 3-8 . The LDH has an ideal formula of MII 1-x MIIIx OH 2 x Am-x m nH2O where M11 is divalent metal ion MIII is trivalent metal ion and A is an exchangeable interlayer anion 2 . In LDH