Abstract
A study was conducted to demonstrate the employment of a double crystallizable symmetry diblock copolymer poly(L-lactide)-b-poly(ethylene oxide) to solve the problem of flow-induced crystallization in the condensed system. The innovative approach allowed PLLA block to stretch PEO block as they were covalently linked with each other. In situ small-angle X-ray scattering (SAXS) measurements were performed using a Bruker Nanostar SAXS instrument equipped with a two-dimensional position-sensitive detector (Bruker AXS) with 512 × 512 channels. Differential scanning calorimetry (DSC) investigations were measured on a TA Instruments 2000 DSC which was calibrated using an indium standard with a precision of ±0.2 °C. The sample was kept in a brass sample holder with Kapton windows as a sandwich structure for isothermal crystallization. The single molecular force generating method demonstrated in the study was quasi-thermodynamic process, leading to quantitatively correlating molecular strain with nucleation.
Original language | English |
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Pages (from-to) | 5878-5882 |
Number of pages | 5 |
Journal | Macromolecules |
Volume | 44 |
Issue number | 15 |
DOIs | |
State | Published - 09 08 2011 |
Externally published | Yes |