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Alternating crystalline lamellar structures from thermodynamically miscible poly(ε-caprolactone) H/D blends
- Source :
- Polymer. 175:320-328
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Thermodynamic interaction and non-isothermal crystallization behavior in a series of protiated (H-) and deuterated (D-) poly(e-caprolactone) (PCL) blends have been systematically investigated. The blends were thermodynamically miscible in the melt. The Flory−Huggins interaction parameter (χ) between H- and D-PCL segments was estimated. The hydroxyl groups in the PCL chain-ends were found to contribute significantly to the negative χ values. Combined characterization of small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) revealed that upon slow cooling, unique alternating H-rich and D-rich PCL lamellar structures are formed regardless of the blend ratio, which is attributed to the Tc difference between H- and D-PCLs. While upon rapid cooling, mixed crystals of H- and D-PCLs are predominantly formed. These results provide insightful information on the melt thermodynamics as well as detailed chain arrangements in lamellar crystals for semi-crystalline H/D polyester blends.
- Subjects :
- Materials science
Polymers and Plastics
Small-angle X-ray scattering
Scattering
Organic Chemistry
02 engineering and technology
Flory–Huggins solution theory
Neutron scattering
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
law.invention
Polyester
chemistry.chemical_compound
Crystallography
chemistry
law
Materials Chemistry
Lamellar structure
Crystallization
0210 nano-technology
Caprolactone
Subjects
Details
- ISSN :
- 00323861
- Volume :
- 175
- Database :
- OpenAIRE
- Journal :
- Polymer
- Accession number :
- edsair.doi...........6abf922e88953f4b76e4aa63de728926