title: Synthesis of organo cobalt-aluminum layered double hydroxide via a novel single-step self-assembling method and its use as flame retardant nanofiller in PP.
abstract: Synthesis of polypropylene/organo-layered double hydroxide (PP/OLDH) has been carried out based on self-assembled organocobalt-aluminum LDH (O-CoAl-LDH). The novel method of synthesizing self-assembled CoAl-LDH and its characterization have also been reported in details. This method is proven to be very efficient way of producing OLDH in a single step with homogeneous composition and structure. As flame-retardant nanofiller, O-CoAl-LDH shows significant decrease in heat release rate (HRR), the total heat release (THR) and the heat release capacity (HRC) of the PP composites, though the thermal stability of the compounds decreases slightly compared to the base polymer. Morphological analyses show that the LDH particles are dispersed in PP matrix in a partially exfoliated form. The activation energy calculation based on the Kissinger method reveals that O-CoAl-LDH has a positive effect on the activation energy of thermal decomposition of PP. However, in the presence of this filler, decomposition of the composites starts at an earlier stage than that of pure PP.
authors: Center for Degradable and Flame-Retardant Polymeric Materials (ERCEPM-MoE), College of Chemistry, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610064, China. deyiwang@scu.edu.cn
authors: De-Yi
authors: DY
authors: Wang
authors: Amit
authors: A
authors: Das
authors: Francis Reny
authors: FR
authors: Costa
authors: Andreas
authors: A
authors: Leuteritz
authors: Yu-Zhong
authors: YZ
authors: Wang
authors: Udo
authors: U
authors: Wagenknecht
authors: Gert
authors: G
authors: Heinrich
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010316:Particle Size; D011126:Polypropylenes / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D006878:Hydroxides; D009942:Organometallic Compounds; D011126:Polypropylenes; D003035:Cobalt; C031356:hydroxide ion; D000535:Aluminum