polyurethane dimensional stabilizers: enhancing performance with hcfo/hfo blowing agents introduction polyurethane (pu) foams are ubiquitous in a wide range of applications, including insulation, cushioning, and structural components. the properties of these foams are significantly influenced by the blowing agent used during their manufacture. historically, chlorofluorocarbons (cfcs) were the blowing agents of choice, but their ozone-depleting...