Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 111-18-2, is researched, Molecular C10H24N2, about The influence of spacer composition on thermomechanical properties, crystallinity, and morphology in ionene segmented copolymers, the main research direction is PTMO PEG ionene spacer composition polymer thermomech crystallinity property.SDS of cas: 111-18-2.
A series of segmented ammonium ionenes with varying weight fractions of 2000 g mol-1 poly(ethylene glycol) (PEG) or poly(tetramethylene oxide) (PTMO) soft segments were synthesized, and a simplified coarse-grained model of these materials was implemented using mol. dynamics simulations. In addition to varying soft segment type (PTMO vs.PEG). Charge d. and soft segment content were varied to create a comprehensive series of segmented ammonium ionenes; thermogravimetric anal. reveals that all segmented ionenes in the series are thermally stable up to 240°C. Differential scanning calorimetry (DSC) and dynamic mech. anal. (DMA) show the formation of phase separated microdomains at low soft segment content. In particular, DSC shows that the hard and soft domains have distinct glass transition temperatures Similarly, simulations show that reduced soft segment content induces stronger microphase separation, reduces soft segment mobility, and increases ionic aggregate connectivity and size. These increased ionic associations result in elastomeric behavior, as evidenced by the higher rubbery plateau moduli observed at lower soft segment contents through DMA. Moreover, simulations show that ionic aggregation increases when switching from PEG to the less polar PTMO repeat units, which is consistent with DMA results showing higher plateau moduli for PTMO-based ionenes relative to PEG ionenes. DSC and X-ray diffraction determined that the degree of crystallinity increased with soft segment content regardless of segment type. Overall, these results suggest a semi-crystalline microphase-separated morphol. strongly influenced by charge d., the degree of ionic aggregation, and the resulting level of confinement and mobility of the soft segments.
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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica