1 Ocak 2020 Dergi makalesi Açık Erişim

Ozbulut, E. Billur Sevinis; Seven, Senem; Bilge, Kaan; Akkas, Tugce; Tas, Cuneyt Erdinc; Yildiz, Burcin; Atilgan, Canan; Menceloglu, Yusuf Z.; Unal, Serkan

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    <subfield code="a">This study reports the synthesis of highly branched poly(arylene ether sulfone)s (HBPAES) and their incorporation into linear poly(arylene ether sulfone) (LPAES) to investigate the effect of branched topology on the morphological and mechanical properties of final polymer blends. The A(2) + B-3 polymerization was utilized to synthesize HBPAESs with varying distance between branch points by reacting monomeric 4,4'-dichlorodiphenyl sulfone (DCDPS) or pre-synthesized chlorine terminated linear oligomers with various degrees of polymerization as the A(2) species with 1,1,1-tris(4-hydroxyphenyl)ethane (THPE) as the B-3 monomer. The chemical structure and the degree of branching of synthesized HBPAESs were characterized by H-1 Nuclear Magnetic Resonance (NMR) spectroscopy, while Size Exclusion Chromatography (SEC) and Differential Scanning Calorimetry (DSC) were used for the determination of their molecular weight and glass transition temperatures. Polymer blends of HBPAES and LPAES (10/90 w/w) were solution cast into free-standing, dry films and characterized by tensile tests, Dynamic Mechanical Analysis (DMA), Atomic Force (AFM) and Scanning Electron (SEM) Microscopies. Complementary to experimental studies, these blends were modeled with dissipative particle dynamics (DPD) simulations to explain their microphase behavior, miscibility, and morphology. The experimental and computational studies together revealed that understanding the effect of the degree of branching on the intermolecular interactions of highly branched polymers with their linear analogues is critical to obtain final polymer blends with tunable mechanical properties and enhanced fracture behavior.</subfield>
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    <subfield code="a">Ozbulut, E. Billur Sevinis</subfield>
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    <subfield code="a">Blends of highly branched and linear poly(arylene ether sulfone)s: Multiscale effect of the degree of branching on the morphology and mechanical properties</subfield>
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