G. D. Spathis

TL;DR: The role of the boundary interphase on the adhesion efficiency between fiber and matrix in the case of polymers reinforced with unidirectional fibers was investigated in this article, where a theoretical model was introduced considering that the composite material consists of three phases; that is, the fiber, the matrix and the interphase, material which is the part of the polymer matrix lying at the close vicinity of the fiber surface.

TL;DR: In this paper, a series of polyester-urethane block copolymers of various molecular weights was prepared via a two-step polymerization process, and the prepolymer composition was kept constant in all the samples, while the NCO/OH ratio during the chain extension was varied from 0.9 to 1.2.

TL;DR: In this article, a theoretical approach for the prediction of creep rupture time of polymers and polymer composites is analyzed, taking into account the viscoelastic path at small strains and the viscoplastic path in higher stresses.

TL;DR: In this article, the morphological changes induced to segmented polyurethane elastomers by varying the NCO/OH ratio during the second step of polymerization, while keeping constant the total hard-segment content (∼ 30%), were studied by means of fourier transform infared spectroscopy (FTIR), differential scanning calorimetry (DSC), and the thermally stimulated depolarization current method (TSDC).

TL;DR: In this paper, the authors investigated the thermomechanical behavior of particle composites in their transition region, and the value of the glass-transition temperature Tg, which constitutes an upper limit for the structurally important glassy region, was examined.