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Title: Humidity-dependent compression-induced glass transition of the air–water interfacial Langmuir films of poly(D,L-lactic acid-ran-glycolic acid) (PLGA)

Constant rate compression isotherms of the air–water interfacial Langmuir films of poly(D,L-lactic acid-ran-glycolic acid) (PLGA)show a distinct feature of an exponential increase in surface pressure in the high surface polymer concentration regime. We have previously demonstrated that this abrupt increase in surface pressure is linked to the glass transition of the polymer film, but the detailed mechanism of this process is not understood. In order to obtain a molecular-level understanding of this behavior, we performed extensive characterizations of the surface mechanical, structural and rheological properties of Langmuir PLGA films at the air–water interface, using combined experimental techniques including the Langmuir film balance, X-ray reflectivity and double-wall-ring interfacial rheometry methods.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [2] ;  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Korea Univ., Seoul (Korea)
  3. Univ. of Chicago, Chicago, IL (United States)
Publication Date:
OSTI Identifier:
1197045
Resource Type:
Journal Article
Resource Relation:
Journal Name: Soft Matter; Journal Volume: 11; Journal Issue: 28
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
NSF
Country of Publication:
United States
Language:
ENGLISH