Effects of poss nanoparticles on ABS‐g‐Ma thermo oxidation resistance

Abstract

Thermo oxidative degradation at and beyond processing temperatures has been carried out on ABS copolymer grafted with Maleic Anhydride (ABS‐g‐Ma) and three nanocomposites with the above material melt‐blended with different types of POSS, being amino‐propyl isobutyl (APOSS), glycidyl (GPOSS), and trisilanol (TPOSS). The incorporation adequacy of the nanofillers into the matrix has been assessed with scanning electron microscopy (SEM) and differential scanning calorimetry (DSC), whereas the quantification of the thermal degradation behavior of each sample was carried out through infrared spectrography (FTIR), thermogravimetric analysis (TGA) including the degradation kinetics and color spectrophotometry (Cielab). Although the results show adequate incorporation and miscibility of the nanofillers into the matrix, the GPOSS and the TPOSS nanocomposites provided no relevant improvements in thermal stability when compared with the base ABS‐g‐Ma, and the APOSS blend exhibits a very slight decay in almost all the quantitative analysis carried out in this work. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

Kinetic Analysis of the Thermal Degradation of Recycled Acrylonitrile-Butadiene-Styrene by non-Isothermal Thermogravimetry

“…Regarding its thermal stability, as with many other polymers, ABS is highly sensitive to thermo-oxidative processes [ 11 , 12 ]. In addition, at moderate temperatures in the range of 220–240 °C, it undergoes some cross-linking phenomena due to the presence of C=C double bonds in the BR phase [ 13 ].…”

Separation and Solubility of Cis and Trans Isomers in Nanostructured Double-Decker Silsequioxanes

“…This class of silsesquioxanes are formally known as double-decker silsesquioxanes (DDSQs) because they are composed of two “decks” of silsesquioxanes stacked on top of one another, forming a cagelike structure . Prior to the advent of DDSQs, the majority of cagelike silsesquioxanes did not incorporate cis and trans isomers. − Of the few cagelike silsesquioxanes that did incorporate geometric isomers, none have been synthesized in large quantities. , Cagelike silsesquioxanes have demonstrated superior properties over their organic counterparts in areas such as thermal and mechanical properties, − solubility, − flame retardance, − oxidative resistance, − and dielectric properties. − …”

Phase Behavior of cis–trans Mixtures of Double-Decker Shaped Silsesquioxanes for Processability Enhancement

“…Functionalized double-decker shaped silsesquioxane (DDSQ-2­(R 1 R 2 )) and corner capped cubic shaped silsesquioxanes (POSS-R 1 ) (Figure ) are cage-like silsesquioxanes with a dimensionally well-defined inorganic core, inert organic groups around the core which provides compatibility with the surround organic matter of interest, and exact specified reactive organic sites. , These structures have become model compounds to investigate effects of nanostructured inorganic additives on polymer properties. − Applications of both DDSQ-2­(R 1 R 2 ) and POSS-R 1 nanostructures have been explored extensively. ,− ,− When used in organic polymers, the hybrid characteristics provide enhanced oxidation temperature, improved hydrophobicity, and low dielectric constant. − ,,,− Recent research extended the use of DDSQ-2­(R 1 R 2 ) and POSS-R 1 as supports to reduce the amount of packed bed required in heterogeneous catalysts. ,,− Other applications for POSS-R 1 include improved ionic liquid performance and its thermal stability, ,− microstructure modifier to improve mechanical performance of metallic alloys, superhydrophobicity in coatings, ,− monomer for increased thermal and mechanical performance of thermosetting polymers, − and use in pharmaceutical applications. ,− …”