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Ethyl 3-(4-(hydroxymethyl)piperidin-1-yl)propanoate (EHMPP) was prepared in quantitative yield under mild conditions via Michael addition reaction of 4-piperidinemethanol with ethyl acrylate. EHMPP underwent condensation polymerization in the presence of a lipase catalyst (CALB) to form poly[3-(4-(methylene)piperidin-1-yl)propanoate] (poly(MPP) or PMPP). Ring-opening and condensation copolymerization...
A series of 2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-[1-(arylimino)ethyl]pyridine ligands (L1–L5) as well as the ligand 2,6-bis[1-(2,6-dibenzhydryl-4-chloro-phenylimino)ethyl]pyridine (L6) were synthesized and reacted with FeCl 2 ·4H 2 O to afford the iron(II) dichloride complexes [LFeCl 2 ] (Fe1–Fe6). All new compounds were fully characterized by elemental and spectroscopic...
Imidazolium poly(butylene terephthalate) ionomers with ionic groups located randomly along the polymer chain or selectively as end-groups (telechelic) have been prepared in order to determine their antimicrobial (AM) activity. Two different approaches have been followed for the linkage of the imidazolium to the polymer backbone: a covalent bond and an ionic aggregation to sulfonated groups covalently...
The double network (DN) technique, developed by authors’ group, provides an innovative and universal pass way to fabricate hydrogels with super high toughness comparable to rubbers. The excellent mechanical performances of DN hydrogels originate from the specific combination of two networks with contrasting structures. The first brittle network serves as sacrificial bonds, which breaks into small...
The vinyl-addition homo- and copolymerization of a norbornene monomer bearing an electron-deficient triarylborane side group (M1) using Pd(II) catalyst in the presence of the 1-octene chain transfer agent efficiently produced a novel class of soluble polynorbornenes functionalized with triarylborane groups. The catalytic system provided high-molecular-weight polymers (M w > 200 × 10 ...
In this work, the effect of several carbon fillers, exfoliated graphite (EG), functionalized graphene sheets (FGS), multi-walled carbon nanotubes (MWCNTs), and oxidized multi-walled carbon nanotubes (f-MWCNTs), were compared on the curing process and physical properties of a cationically photocurable epoxy resin. The extent of the photopolymerization was monitored by Real-Time FTIR spectroscopy. It...
A novel alternating D–A copolymer, PPor–BT, with dioctylporphyrin (Por) as a donor unit and 5,6-bis(octyloxy)benzo-2,1,3-thiadiazole (BT) as an acceptor unit, was designed and synthesized by Pd-catalyzed Sonogashira-coupling reaction. The copolymer showed good solubility and film-forming ability. PPor–BT exhibited a broad absorption band from 350 to 950 nm with two peaks centered at 456 and 818 nm...
The strength development and healing of symmetric and asymmetric interfaces of amorphous cyclic olefin copolymers (COC) was studied by assessment of diffusion and lap-shear strength measurement of samples bonded at different temperatures, pressures and healing times. Amorphous COCs comprise copolymers of norbornene and ethylene whereby COCs with differing norbornene content have different glass transition...
The effect of preparation methods and processing conditions on morphology and mechanical properties of poly(styrene-b-ethylene-co-butylene-b-styrene) (SEBS) triblock copolymer were investigated with atomic force microscopy (AFM) tapping mode and nanomechanical mapping, tensile testing, and gel permeation chromatograph (GPC). It was found that the samples prepared by solution casting and melt processing...
Structural, physical and separation properties of polyurethane membrane were investigated by configuration bias grand canonical Monte Carlo and molecular dynamic methods and the effects of degree of polymerization on these properties were studied. To understand the effect of degree of polymerization of polyurethane membrane on its separation property, the adsorption of furfural as pure and binary...
The interfacial structure of all-polyethylene laminate (linear low density polyethylene (LLDPE)/deuterated polyethylene (D-PE)) was investigated using different microprobe methods, scanning thermal microscopy (SThM), and confocal laser nano-Raman spectroscopy. By scanning the thermal probe under isothermal conditions over a cross section of the laminate film, a high-contrast image of apparent thermal...
The high-temperature (T g > 650°) wholly aromatic polybenzoxazoles (PBO) polymer chains in thin films underwent elastic energy release via local deformation of crazing when stretched beyond a critical strain around 0.5%. The strain localization in the ultra-rigid polymer was quickly superseded by craze fibril breakdown, triggering catastrophic fracture at low extensions below ∼3%. Although...
The addition of silica nanoparticles (23 nm, 74 nm, and 170 nm) to a lightly crosslinked, model epoxy resin, was studied. The effect of silica nanoparticle content and particle size on glass transition temperature (T g ), coefficient of thermal expansion (CTE), Young's modulus (E), yield stress (σ), fracture energy (G IC ) and fracture toughness (K IC ), were investigated....
The physical aging of polystyrene (PS) confined in a multilayered film arrangement was explored using differential scanning calorimetry (DSC). The multilayered films were produced via multilayer coextrusion and consisted of alternating layers of PS and polycarbonate (PC), with PS layer thicknesses ranging from 50 nm to 500 nm. A 125 μm bulk control film of pure PS was also extruded and studied for...
Compatibilization is the modification of the interface in immiscible polymer blends in order to refine and stabilize their phase structure. The presence of a compatibilizer at the interface markedly affects the deformation behaviour of the dispersed droplets during and after cessation of flow. In this work the morphology development in blends of polystyrene and linear low-density polyethylene compatibilized...
A new electrochromic norbornene derivative (NB) containing symmetrical diphenylamine and unsymmetrical triphenylamine groups, was synthesised from norbornene amine and unsymmetrical triphenylamine-substituted bromide. NB was used to obtain unsaturated PNB via ring-opening metathesis polymerization using different Grubbs' catalysts, followed by hydrogen reduction to obtain saturated HPNB. PNB and HPNB...
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