TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Hübner, Hanna
A1  - Niebuur, Bart-Jan
A1  - Janka, Oliver
A1  - Gemmer, Lea
A1  - Koch, Marcus
A1  - Kraus, Tobias
A1  - Kickelbick, Guido
A1  - Stühn, Bernd
A1  - Gallei, Markus
T1  - Crystalline Carbosilane-Based Block Copolymers: Synthesis by Anionic Polymerization and Morphology Evaluation in the Bulk State
JF  - Macromolecular Chemistry and Physics
N2  - Block copolymers (BCPs) in the bulk state are known to self-assemble into different morphologies depending on their polymer segment ratio. For polymers with amorphous and crystalline BCP segments, the crystallization process can be influenced significantly by the corresponding bulk morphology. Herein, the synthesis of the amorphous-crystalline BCP poly(dimethyl silacyclobutane)-block-poly(2vinyl pyridine), (PDMSB-b-P2VP), by living anionic polymerization is reported. Polymers with overall molar masses ranging from 17 400 g to 592 200 g mol−1 and PDMSB contents of 4.8–83.9 vol% are synthesized and characterized by size-exclusion chromatography and NMR spectroscopy. The bulk morphology of the obtained polymers is investigated by means of transmission electron microscopy and small angle X-ray scattering, revealing a plethora of self-assembled structures, providing confined and nonconfined conditions. Subsequently, the influence of the previously determined morphologies and their resulting confinement on the crystallinity and crystallization behavior of PDMSB is analyzed via differential scanning calorimetry and powder X-ray diffraction. Here, fractionated crystallization and supercooling effects are observable as well as different diffraction patterns of the PDMSB crystallites for confined and nonconfined domains.
KW  - anionic polymerization
KW  - confinement
KW  - crystallization
KW  - microphase separation
KW  - morphology
Y1  - 2023
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-3689
SN  - 1022-1352
SS  - 1022-1352
U6  - https://doi.org/10.1002/macp.202200178
DO  - https://doi.org/10.1002/macp.202200178
VL  - 224
IS  - 3
SP  - 2200178
ER  -