Effects of trimethylaluminum vapor pressure and exposure time on inorganic loading in vapor phase infiltrated PIM-1 polymer membranes

Interpreting inorganic compositional depth profiles to understand the rate-limiting step in vapor phase infiltration processes

“…Additionally, Jean et al showed how this model could be used to predict and quantify the effects of TMA exposure pressure on the infiltration kinetics and inorganic loading of PIM-1. 30 In this study, we apply the outputs of this reaction-diffusion model to better understand the rate-limiting mechanisms for VPI of TMA and TiCl 4 into PMMA based upon inorganic compositional depth profiles collected ex situ after infiltration. To our knowledge, this is the first time that these mechanisms are being determined for a VPI process by comparing the outputs of this model to experimental compositional depthprofile measurements.…”

“…Additionally, Jean et al showed how this model could be used to predict and quantify the effects of TMA exposure pressure on the infiltration kinetics and inorganic loading of PIM-1. 30…”

Dealkylation of Poly(methyl methacrylate) by TiCl4 Vapor Phase Infiltration (VPI) and the Resulting Chemical and Thermophysical Properties of the Hybrid Material

“…Vapor phase infiltration (VPI) infuses inorganic species into polymers by exposing the polymer to vapor-phase metal–organic or metal halide precursors that sorb into and become “entrapped” within the polymer. − The resultant organic–inorganic hybrid materials have properties that differ from the pure polymer. ,− For example, polymers and block copolymers infiltrated with TiO x have been shown to have altered mechanical, optical, chemical, and thermal properties. ,,− The properties of these hybrids are dependent upon the quantity of infiltrated inorganic material, the chemical bonding between the organic and inorganic components, and the spatial distribution of the inorganic component. ,,, …”