tailieunhanh - Báo cáo hóa học: " Double In Situ Approach for the Preparation of Polymer Nanocomposite with Multi-functionality"

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: Double In Situ Approach for the Preparation of Polymer Nanocomposite with Multi-functionality | Nanoscale Res Lett 2009 4 303-306 DOI S11671-008-9242-1 NANO EXPRESS Double In Situ Approach for the Preparation of Polymer Nanocomposite with Multi-functionality De-Yi Wang Yan-Peng Song Jun-Sheng Wang Xin-Guo Ge Yu-Zhong Wang Anna A. Stec T. Richard Hull Received 12 November 2008 Accepted 30 December 2008 Published online 23 January 2009 to the authors 2009 Abstract A novel one-step synthetic route the double in situ approach is used to produce both TiO2 nanoparticles and polymer PET and simultaneously forming a nanocomposite with multi-functionality. The method uses the release of water during esterification to hydrolyze titanium IV butoxide Ti OBu 4 forming nano-TiO2 in the polymerization vessel. This new approach is of general significance in the preparation of polymer nanocomposites and will lead to a new route in the synthesis of multifunctional polymer nanocomposites. Keywords In situ polymerization Nanocomposites Polyesters Flame retardance Fire retardant Introduction Polymer nanocomposites represent a new class of composite materials and have attracted considerable interest during the past few years particularly as a result of their enhanced properties . fire retardation mechanical electrical and thermal properties. Many methods of preparing nanocomposites have been investigated such as . Wang . Song . Wang . Ge . Wang Center for Degradable and Flame-Retardant Polymeric Materials College of Chemistry Sichuan University 610064 Chengdu China e-mail polymers@ A. A. Stec T. Richard Hull Centre for Fire and Hazards Science School of Forensic and Investigative Science University of Central Lancashire Preston PR1 2HE UK e-mail trhull@ organic and inorganic hybridization self-organization in situ polymerization and so on. However the addition of nanoparticles to the polymer matrix has been the most commonly adopted method for producing polymer nanocomposites. It is usually necessary for the nanoparticle surface to