Effects of Carbon Black Type on Breathable Butyl Rubber Membranes
Abstract
This study addresses the formulation effects of carbon black type and carbon black loading on the physical properties of electrospun butyl rubber nonwoven membranes. These membranes are envisioned as a potential breathable barrier layer in chemical and biological (CB) protective garments. The advantages of an electrospun crosslinked elastomer system, when compared to similarly prepared thermoplastics, are increased flexibility, durability, and chemical resistance. The porosity and surface area of these membranes are directly related to the water vapor transmission, air flow resistance, aerosol resistance, and the transport of chemical vapors. The barrier properties will be affected by the ability to control pore sizes, fiber diameter, permeability, and physical properties through formulation and process variables. Experimental results reveal that fiber diameter decreased with decreasing carbon black particle size and increasing carbon black structure. Density of the electrospun mats decreased with smaller particle size and higher structure. Decreasing carbon black particle size and increasing structure showed increased stress at break, ultimate elongation and modulus of the membranes. Good dispersion of smaller carbon black size and higher carbon black structure lead to decreased electrical resistance and increased ultimate strength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2006
- Accession Number
- ADA481756
Entities
People
- D. P. Murphy
- Joey Mead
- P. Threepopnatkul
- W. Zukas
Organizations
- University of Massachusetts Lowell