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Aromatic polyesters derived from 5,5′-disubstituted BIS(m-phenylene) crown) ethers
10.1016/j.polymer.2018.03.031 2018-03-20 A new monomer of the AB type, 5-carboxy-1,3-phenylene-5′-hydroxy-1′,3′-phenylene-32-crown-10 (5), was synthesized. Direct polymerizations of bis(5-hydroxy-1,3-phenylene)-32-crown-10 (13), an AA diphenolic macrocyclic monomer, with BB diacid monomer bis(5-carb... |
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On the role of hydrogen bondingon water absorption in polymers
10.1016/j.polymer.2018.03.033 2018-03-19 A kinetic model is proposed for the absorption of water in polymers. The process of bonding-debonding water molecules is described by two opposite reactions with different rate constants, and the key role of the concentration of traps by hydrogen bonding in t... |
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Unexpected brittleness: Does the major component in binary polymer blends always make sense?
10.1016/j.polymer.2018.03.035 2018-03-19 The structures and properties of melt-miscible poly(oxymethylene) (POM)/poly(butylene succinate) (PBSU) blends with low POM contents (≤10 wt%) have been investigated. As a rubbery semicrystalline polymer, neat PBSU is tough and highly ductile. However, when b... |
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In-situ spectroscopic and thermal analyses of phase domains in high-impact polypropylene
10.1016/j.polymer.2018.03.037 2018-03-19 High-impact polypropylene (HIPP) is a commercially important polymer alloy with complex morphological structure. In this contribution, two commercial HIPPs have been investigated in detail by atomic force microscopy-infrared in conjunction with local thermal ... |
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Mechanochemical changes in absorption and fluorescence of DDM-containing epoxies
10.1016/j.polymer.2018.03.029 2018-03-16 Mechanochemical changes in absorption or fluorescence in solid polymers are important for the development of new methods of damage sensing, and must be demonstrated in structural polymers such as epoxies for widespread use. With this in mind, we have observed... |
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Barrier properties and structure of liquid crystalline epoxy and its nanocomposites
10.1016/j.polymer.2018.03.027 2018-03-15 There is ever increasing demand for a suitable sealant material to protect electronic devices, in particular, different displays. We present a new approach to generate a liquid processible material that possesses excellent barrier properties and flexibility t... |
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Green nanofillers: Plant virus reinforcement in hydrophilic polymer nanocomposites
10.1016/j.polymer.2018.03.030 2018-03-15 Aqueous polymeric systems are critical components for a bevy of uses, most notably in biomedical sciences. However, these materials typically have inherently weak mechanical properties. A critical area of research in recent years is the development of new bio... |
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Facile synthesis of stereoregular helical poly(phenyl isocyanide)s and poly(3-hexylthiophene)-block-poly(phenyl isocyanide) copolymer using chiral π-allylnickel complexes as initiators
10.1016/j.polymer.2018.03.024 2018-03-15 Living polymerization of achiral phenyl isocyanide using a simply prepared chiral π-allylnickel complex as initiator was found to proceed in helix-sense-selective manner. The polymerization of achiral phenyl isocyanide, 4-isocyanobenzoyl-2-aminoisobutyric aci... |
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Tuning quaternary ammonium ionomer composition and processing to produce tough films
10.1016/j.polymer.2018.03.028 2018-03-15 Multi-block and random quaternary ammonium poly (arylene ether sulfone) copolymer ionomers were synthesized using sequential reactions. Ionomer film processing involved two separate methods: heterogeneous-conversion and solution-casting a pseudo-solution. Fil... |
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Comb-shaped aromatic polyamide cross-linked by Diels-Alder chemistry: Towards recyclable and high-performance thermosets
10.1016/j.polymer.2018.03.026 2018-03-13 A new class of recyclable and high-performance thermosets from comb-shaped aromatic polyamides with pendent furan groups, which was prepared from a newly designed furan-containing diacid by high-temperature polycondensation in solution was reported. 1H nuclea... |