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Title: Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior

Journal Article · · Macromolecular Rapid Communications
 [1];  [2];  [1];  [3];  [1];  [4]
  1. Corporate Research and Development The Procter and Gamble Company Cincinnati OH 45224 USA
  2. Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA
  3. Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA
  4. Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA, Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA

Block copolymers have been extensively studied due to their ability to spontaneously self‐organize into a wide variety of morphologies that are valuable in energy‐, medical‐, and conservation‐related (nano)technologies. While the phase behavior of bicomponent diblock and triblock copolymers is conventionally governed by temperature and individual block masses, it is demonstrated here that their phase behavior can alternatively be controlled through the use of blocks with random monomer sequencing. Block random copolymers (BRCs), i.e., diblock copolymers wherein one or both blocks are a random copolymer comprised of A and B repeat units, have been synthesized, and their phase behavior, expressed in terms of the order–disorder transition (ODT), has been investigated. The results establish that, depending on the block composition contrast and molecular weight, BRCs can microphase‐separate. We also report that large variation in incompatibility can be generated at relatively constant molecular weight and temperature with these new soft materials. This sequence‐controlled synthetic strategy is extended to thermoplastic elastomeric triblock copolymers differing in chemistry and possessing a random‐copolymer midblock.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐06CH11357
OSTI ID:
1378300
Journal Information:
Macromolecular Rapid Communications, Journal Name: Macromolecular Rapid Communications Vol. 38 Journal Issue: 17; ISSN 1022-1336
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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