TY - JOUR
T1 - Branched polyesters
T2 - Recent advances in synthesis and performance
AU - McKee, Matthew G.
AU - Unal, Serkan
AU - Wilkes, Garth L.
AU - Long, Timothy E.
N1 - Funding Information:
This material is based upon work supported by the US Army Research Laboratory and US Army Research Office under grant number DAAD19-02-1-0275 Macromolecular Architecture for Performance (MAP) MURI. The authors also thank Eastman Chemical Company for their continued support of polyester research.
PY - 2005/5
Y1 - 2005/5
N2 - The synthesis, characterization, physical properties, and applications of branched polyesters are discussed. This review describes recent efforts in the synthesis of statistically and tailored branched systems, and performance advantages compared to linear counterparts. In particular, an emphasis is placed on long-chain branching, where the branches are sufficiently long enough to form entanglements. Step-growth polymerization methodologies that employ various combinations of multi and mono-functional groups to achieve different levels of branching are reviewed in detail. The performance of branched polyesters, including behavior in dilute and semi-dilute solutions, and melt and solid-state properties are discussed. The implications of topological parameters including branch length, number of branches, and branching architecture on rheological performance are also reviewed. Although the majority of this review focuses on the synthesis and rheological behavior of branched polyesters, some discussion is devoted to the influence of branching on solid-state properties, sub-micron fiber formation, and controlled biodegradation for drug-delivery applications. Finally, a perspective of future directions in high performance applications for branched polyesters is provided.
AB - The synthesis, characterization, physical properties, and applications of branched polyesters are discussed. This review describes recent efforts in the synthesis of statistically and tailored branched systems, and performance advantages compared to linear counterparts. In particular, an emphasis is placed on long-chain branching, where the branches are sufficiently long enough to form entanglements. Step-growth polymerization methodologies that employ various combinations of multi and mono-functional groups to achieve different levels of branching are reviewed in detail. The performance of branched polyesters, including behavior in dilute and semi-dilute solutions, and melt and solid-state properties are discussed. The implications of topological parameters including branch length, number of branches, and branching architecture on rheological performance are also reviewed. Although the majority of this review focuses on the synthesis and rheological behavior of branched polyesters, some discussion is devoted to the influence of branching on solid-state properties, sub-micron fiber formation, and controlled biodegradation for drug-delivery applications. Finally, a perspective of future directions in high performance applications for branched polyesters is provided.
KW - Branching
KW - Crystallization
KW - Entanglements
KW - Polyesters
KW - Rheology
KW - Step-growth polymerization
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U2 - 10.1016/j.progpolymsci.2005.01.009
DO - 10.1016/j.progpolymsci.2005.01.009
M3 - Review article
AN - SCOPUS:18444384813
SN - 0079-6700
VL - 30
SP - 507
EP - 539
JO - Progress in Polymer Science
JF - Progress in Polymer Science
IS - 5
ER -