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Title: Aliphatic Polyester Block Polymer Design

Journal Article · · Macromolecules
 [1];  [1]
  1. Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States

Aliphatic polyester block polymers constitute a highly useful and amazingly versatile class of self-assembled materials. Analogous to styrenic block polymers in both design and function, the property profiles of these degradable materials can be precisely tailored by altering the chemical structure of the components. Driven by this ideal, we have examined the impact of n-alkyl substituents on the polymerization thermodynamics and kinetics of substituted δ-valerolactone monomers and developed guiding design principles based on critical structure–property relationships in the resulting aliphatic polyesters. Under bulk room temperature conditions the polymerization rate depends strongly on substituent position and exhibits a more modest dependence on alkyl length (from –CH3 to –(CH2)8CH3). The enthalpy and entropy of polymerization are significantly influenced by substituent position, but both are largely insensitive to n-alkyl length. However, the physical properties of the resulting aliphatic polyesters depend much more on substituent length than on substituent position. Notably, we demonstrate that polymer entanglement molar mass and solubility parameter can be systematically tuned by changing the substituent length. We discuss how these key structure property relationships can be used to inform the design of advanced sustainable materials for future technologies important in the arena of environmentally friendly materials.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); E.I. DuPont de Nemours & Co.; The Dow Chemical Company; U. S. National Science Foundation
Grant/Contract Number:
DMR-9304725; AC02-06CH11357
OSTI ID:
1256779
Alternate ID(s):
OSTI ID: 1249247
Journal Information:
Macromolecules, Journal Name: Macromolecules Vol. 49 Journal Issue: 7; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 178 works
Citation information provided by
Web of Science

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