Macromolecular Chemistry and Physics · 2013 · 38 citations · 26 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsGelsPolymer CharacterizationPolymer NetworksPolymer PhysicsPolymer StructurePolymerization KineticsChainsGel PointGelation KineticsGelation MechanismsMechanical Properties Of NetworksMolar MassPolymer Network StructureRetardation Effects
Statistical networks of butyl acrylate and 1,4‐butanediol diacrylate are photopolymerized in bulk, both in the presence and absence of the RAFT agent EPHT. The amounts of crosslinker and RAFT agent are varied. The Young's moduli of the RAFT networks are always lower than those of conventionally obtained networks. With increasing amounts of RAFT agent, the Young's modulus decreases and the strain at break values increase, respectively. The network density, the apparent molar mass of the network chains and the swelling show significant differences between RAFT‐ and conventionally obtained networks. The degree of swelling and the amount of extractable polymer increase largely with the amount of RAFT agent. Kinetic DSC measurements show that the gel point is delayed with increasing amounts of RAFT agent. In addition, a rate retardation effect with increasing RAFT agent concentration is observed. image
26
Living Radical Polymerization by the RAFT Process
Graeme Moad, Ezio Rizzardo, San H. Thang · Australian Journal of Chemistry · 2005 · 2.2K citations