Showing papers in "Polymer in 1989"

TL;DR: In this article, the polymerization of aniline in aqueous solutions was studied as a function of a wide variety of synthesis parameters, such as pH, relative concentration of reactants, polymerization temperature and time.

TL;DR: In this paper, a tetraglycidyl-4,4′-diaminodiphenyl methane (TGDDM) based epoxy resins were prepared by dissolving polyetherimide (PEI) in a TTRGDFM-based resin with 30 p.h.r.

TL;DR: In this article, a ternary mixture of diglycidyl ether of bisphenol A (epoxy), poly(ether sulphone) (PES) and diaminodiphenylmethane (curing agent) was investigated by light scattering, scanning electron microscopy (SEM) and differential scanning calorimetry.

TL;DR: In this article, the authors investigated the crystallization and melting of poly(ethylene naphthalene-2,6-dicarboxylate) (PEN) by differential scanning calorimetry and by wide angle X-ray scattering using synchrotron radiation.

TL;DR: In this paper, the synthesis of poly(para-2,5-di-n-hexylphenylene) via the palladium catalysed coupling of 4-bromo-2-5-d-nhexylbenzeneboronic acid is described.

TL;DR: In this article, it was shown that the Young's modulus is independent of the particle size of the filler, and that if pure glass beads are used as filler, the Young modulus appears to be significantly dependent on the particle sizes.

TL;DR: The empirical principle of time-temperature superposition has been found to fail for a miscible blend of 20 weight% poly(ethylene oxide) in poly(methyl methacrylate).

TL;DR: In this paper, the influence of molecular structure and characteristics of an uncrystallized rubbery second component (EPR) and poly(vinyl acetate) (PVAc)) on the melt miscibility, phase structure, morphology, thermal and crystallization behaviour of blends based on poly( d (−)-3-hydroxybutyrate (PHB) has been investigated by differential scanning calorimetry and optical microscopy.

TL;DR: In this article, a mixture of epoxy with liquid nitrile rubber (CTBN, ATBN) was cured under various conditions and structure development during curing was investigated by light scattering, scanning electron microscopy and torsional braid analysis.

TL;DR: In this article, polytetramethylene oxide based polyurethane oligomers with multiple triethoxysilane groups have been successfully incorporated into a TEOS based silicate network.

TL;DR: In this paper, the mechanical properties of impact modifiers were tested with both a torsion pendulum test and a tensile test and the notched impact strength of the blends was measured as a function of temperature.

TL;DR: In this paper, the Ni-catalysed coupling of dibromoaromatics was used to synthesize poly( para -2,5-di-n-alkylphenylene)s.

TL;DR: In this article, the effect of maleic anhydride (MA) concentration on the blending process and the impact behavior of EPDM rubber was investigated using infra-red spectroscopy and elemental analysis.

TL;DR: In this paper, a toughening mechanism is proposed in which the cavitation stress of the rubber and the interparticle spacing play crucial roles, and a correlation exists between the stress at which the rubber particles cavitate in the tensile test and the impact behaviour of the blend.

TL;DR: In this paper, a high-energy electron diffraction was performed on syndiotactic polystyrene with a high degree of stereoregularity and crystallinity in the form of thin, electron-transmissible films.

TL;DR: In this paper, the non-isothermal crystallization kinetics of poly(p -phenylene sulphide) (PPS) were studied using the theory of Ozawa.

TL;DR: In this paper, internal reflection spectroscopy is used for the study of the structural gradient from the outer skin into the core in a commercial polyethylene film. And it is shown that the skin is highly crystalline and that an approximate amount of 40% amorphous material is found in the core of the film.

TL;DR: In this paper, the organization of lamellae in developing spherulites of i-polypropylene growing from the melt at 155 and 150°C has been investigated in detail using permanganic etching and transmission electron microscopy (TEM).

TL;DR: In this paper, the surface coverage of primary amino groups on polystyrene and bisphenol-A polycarbonate was determined by means of neutron activation analysis after derivatization of these groups with 5-bromosalicylaldehyde and estimated to be approximately 0.5 amino groups per nm2.

TL;DR: In this article, it was shown that compatible polymer blends exhibit specific glass transition-composition behavior, reflected in deviations from the Gordon-Taylor equation for supposed volume additivity of the blend components.

TL;DR: In this paper, a solution imidization procedure was used to convert quantitatively the poly(siloxane amic acid) intermediates to the corresponding polyimides, which are flexible, tough, transparent and soluble.

TL;DR: In this article, the effect of heteroatom composition and film growth conditions on the redox and optical properties of the copolymers is discussed, and a qualitative energy level diagram is presented.

TL;DR: In this paper, the solubility of CO 2 and CH 4 plus permeability coefficients for these and other gases were measured for a series of poly(4-methyl-1-pentene) polymers with crystallinity levels ranging from 20% to 75%.

TL;DR: In this article, the micellar structures formed by two-block copolymers in a block copolymer-solvent system were considered by using the scaling method and the equilibrium parameters of micelles were determined depending on the composition of the copolym and the strength and concentration of the solvent in the system.

TL;DR: In this paper, a Fourier transform infra-red analysis of polybenzimidazole/polyimide (PBI/PI) miscible blends was carried out in the presence of low-molecular-weight monofunctional compounds.

TL;DR: Differential scanning calorimetry (d.s.c.) and water vapour pressure measurement have been used to investigate the poly(ethylene glycol) (PEG) interaction with water.

TL;DR: In this article, the polymerization of ǫ-caprolactone (CL) with poly(ethylene glycol) (PEG) of low molecular mass was carried out in bulk at 185°C.

TL;DR: The microstructure of blends of bisphenol A polycarbonate (PC) and poly(ethylene terephthalate) (PET) was studied by differential scanning calorimetry (d.s.c.) and infra-red spectroscopy as mentioned in this paper.