Organocatalytic strategy to telechelic oligo(ε-caprolactone-co-p-dioxanone): Photocurable macromonomers for polyester networks

Degradation in Order: Simple and Versatile One‐Pot Combination of Two Macromolecular Concepts to Encode Diverse and Spatially Regulated Degradability Functions

“…The weaker acidity of DPP (p K a ≈3.7–3.9) [23] than PTSA and the rt may justify the longer reaction time, 24–96 h, necessary to achieve high molar masses (Table 1 ). Although the ROP of CL also occurs in presence of DPP as catalyst, [18b] in the current polymerization system, the preferred polymerization pathway in acidic conditions is the reaction between the vinyl ether bond and the ‐OH chain ends, leading to SGP of the macromonomers and hence, the formation of the acetal bonds. In fact, by quenching the ROP step at ca.…”

Aluminum Salen Complexes Modified with Unsaturated Alcohol: Synthesis, Characterization, and Their Activity towards Ring-Opening Polymerization of ε-Caprolactone and D,L-Lactide

“…At the same time, it should be mentioned that the isolation of individual catalysts is more significant than the investigation of catalytically active metal systems based on modified reagents [ 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 ]. The second way is to use the post-polymerization modification of previously obtained polymers [ 76 , 77 , 78 , 79 , 80 , 81 , 82 ].…”

Poly(ether ester) and related block copolymers via organocatalytic ring‐opening polymerization

“…41 Many research groups have focused on the copolymerization of CL with PDO as a way to improve the hydrophilicity and biodegradability. [42][43][44][45][46] Reconsidering tghat PPDO has fast degradation rate, excellent flexibility, pliability and good tensile strength, we proposed that the construction of block copolymers of PCL and PPDO would combine the properties of these two different polymers, thereby provide an effective way to construct a polymeric material that has good thermal stability, adjustable degradation kinetics, processing capability, which may satisfy the requirement for a novel biomaterial. In this regard, 1,8-diazabicyclo [5.4.0]undec-7-ene (DBU) and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) were initially discussed in detail as highly active catalysts for the ROP of PDO (Scheme 1).…”

“…However, the rather hydrophobic nature and the very slow degradation profile of PCL (three or more years) undermine its biodegradability and impede its medical applications 41 . Many research groups have focused on the copolymerization of CL with PDO as a way to improve the hydrophilicity and biodegradability 42–46 . Reconsidering tghat PPDO has fast degradation rate, excellent flexibility, pliability and good tensile strength, we proposed that the construction of block copolymers of PCL and PPDO would combine the properties of these two different polymers, thereby provide an effective way to construct a polymeric material that has good thermal stability, adjustable degradation kinetics, processing capability, which may satisfy the requirement for a novel biomaterial.…”