The composition of Adomnán’s Vita Columbae

Effects of Photodegradable o‐Nitrobenzyl Nanogels on the Photopolymerization Process

“…The accumulated stress in resin can lead to many issues that include polymer and substrate warping, internal and interfacial defects, reduced toughness, and fatigue resistance among others. [8,9] There have been many efforts to control the polymerization shrinkage and stress, including the design of novel initiators, [10] monomers [11] or oligomers, [12] the reduction of initial reactive group concentration by inorganic [13] or organic fillers, [14] particles, [15] and nanogels, [16] as well as multiphase generation based on thermodynamically driven demixing, [17] optimization of photocuring protocols, [18] utilization of step-growth polymerization, [13] or ring-opening polymerization [19] reaction mechanisms, and the formation of covalent adaptable networks (CANs). [20,21] Nanogels are internally crosslinked and cyclized single or multi-chain polymeric particles, [22] which have attracted considerable attention from many areas such as dental materials, [23] controlled-release drug delivery, [24][25][26][27] biosensing, [28] tissue engineering, [29] photonic materials, [30] and polymer composites [31] due to their tunable compositions and structures, high specific surface area, large number of chain ends for potential chemical modification and biocompatibility.…”