The effects of butyl chloride as a promoter in the ethylene polymerization were studied using a Mg(OEt) 2 /TiCl 4 /triethyl aluminum (TEA) Ziegler-Natta catalyst system, where Mg(OEt) 2 , TiCl 4 , TEA were used as support, catalyst, and activator, respectively. The influence of BC on the catalyst performance, polymerization rate, and polymer properties were investigated. This study strongly indicates that BC could act as a promoter with high performance in the ethylene polymerization. There was a remarkable increase in the catalyst yield and polymerization rate, in particularly, in the presence of hydrogen which was used for controlling the molecular weight. A reduction in the polymer molecular weight was observed in the presence of BC and hydrogen. The morphology of the polymers was evaluated through scanning electron microscopy and particle size distribution. V C 2013 Wiley Periodicals, Inc. J. Appl.Polym. Sci. 2014, 131, 40189.

Effect of chlorocyclohexane (CHC) on ethylene polymerization using MgCl 2 /TiCl 4 /TEA Ziegler-Natta catalyst system was studied, where MgCl 2 , TiCl 4 , and TEA (triethyl aluminum) were used as support, catalyst, and activator, respectively. The polymerization rate, catalyst activity, and produced polymer were significantly affected by the presence of CHC as a promoter. This study strongly indicates that CHC will act as a promoter with high performance in the ethylene polymerization. There was a remarkable increase in the catalyst yield and polymerization rate, particularly, in the presence of hydrogen which was used for controlling the molecular weight. A reduction in the polymer molecular weight was observed in the presence of CHC and hydrogen. The amount of the produced wax as a byproduct noticeably reduced. The morphology of the polymers was evaluated through scanning electron microscopy and particle size distribution.

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/mren.202000004. Happy 60 th , JBPS! Three polymeric materials (polyaniline, polypyrrole, and poly(methyl methacrylate)) are selected, prepared, and evaluated for potential use in acetone sensing (for possible diabetes-related applications). Of the materials studied, polyaniline and polypyrrole show the most promise. Polypyrrole allows for more acetone sorption (i.e., higher concentration of acetone sorbed), but does not distinguish between different target analytes (that is, it is not selective). A material's ability to distinguish between several gas analytes simultaneously (in a gas mixture) is rarely evaluated; selectivity is typically based on a "one-analyteat-a-time" investigation. However, comparison of acetone sorption (in one experimental test) and interferent sorption (in a complementary experimental test) does not consider interactions that might occur between gas analytes; this motivates the sorption analysis of gas mixtures that is shown in this work. The most promising results are obtained when polyaniline or polypyrrole is exposed to acetone-rich gas mixtures with low amounts of acetaldehyde, ethanol, and benzene (interferent gases). Polymer doping using three metal oxides (SnO 2 , WO 3 , and ZnO) is also investigated, but metal oxide addition has a limited effect on the sorption performance. This is true for all three metal oxides, regardless of the amount of doping (over the range studied; up to 20 wt%).