The Role of Entanglements in the Swelling of Poly(dimethylsiloxane) Networks

2,2,4-trimethylpentane 2,3-dimethylpentane affine and phantom affine model affine network model B₁ B2 precursors benzene calculated cm³/mol data in Figs determined deuterated DMP and TMP dynamic mechanical elastic chains elastic modulus endlinked Equilibrium shear moduli equilibrium swelling curve Figure Flory Flory-Rehner model free energy Ge/RT high molecular weight imperfect networks interaction parameter interpenetrating networks intrinsic viscosity IPNs Lapp linear chains linear PDMS Macosko-Miller model Macromolecules methyl iodide mixture Mn,el model and imperfect model networks modulus mol/m³ molar volume molecular weight precursors molecule monomer N₁ networks prepared networks swollen neutron scattering number of moles obtained PDMS networks PDMS-DMP pendant chains phantom network model Phys polydimethylsiloxane polymer blend polymer chains polymer volume fraction polymerization round bottom flask sample A-4 samples E-1 scattering data scattering intensity separatory funnel silane sol fraction solution solvent swelling results swollen in toluene swollen to equilibrium synthesize Table toluene and benzene trapped entanglements v₁ versus Wsol ᎡᎢ