механічні властивості

TPU/Mica Composites Prepared in Torque Rheometer: Processability, Mechanical Properties and Morphology

This work is concerned with the preparation of thermoplastic polyurethane elastomer (TPU) composites with mica, and their characterization as for processability, mechanical and thermal properties and morphology behavior. The amount of added mica varied from 0 to 20 phr and the results showed few interactions between mica and the polymer matrix. Processability is facilitated by the increasing amount of mica but TPU upon strain crystallizability, as well as Tg, decrease with the increase in mica content.

The Evaluation of bis(4-Methylphenylsulfonyldithiocarbimato)zincate (II) (ZNIBU) Activity in the Vulcanization of NBR Compounds and its Effect on their Mechanical Properties

The effect of accelerator type on the vulcanization process and mechanical properties of nitrile rubber (NBR) compounds was investigated. Three commercial accelerators were selected, N-N-t-butyl-2-benzothiazole sulfenamide (TBBS), tetramethylthiuram disulfide (TMTD) and bis(dimethyldithiocarbamato)zinc (II) (ZDMC) and compared with the compound bis(4 methylphenylsulfonyldithiocarbimato)zincate (II) (ZNIBU). Surprisingly, it was found that the optimum vulcanization time for ZNIBU showed better results than for TBBS.

The Influence of Sample Preparation on the Strength Results ofa Pan-based Carbon Fiber

In this work the influence of different configurations in the sample preparation process on commercial polyacrylonitrile-based carbon fibers mechanical tests were studied. Mechanical properties, such as tensile strength, Young’s modulus, elongation and Weibull modulus, were evaluated. The results showed that all sample preparation steps may have strong influence on the results.

Полімерні композити із взаємопроникною структурою

Вивчено одержання і властивості композитів, що складаються з двох суцільних взаємопроникних фаз, одна з яких принаймні, є полімерною. Розглянуто три різних види таких композитів: полімер-полімерні (ПВХ-ПMMA), полімер-мінеральні (ПMMA-гіпс) і полімер-металеві (ПВХ-сплав Вуда). Приготування композитів відбувалось заповненням пористої матриці одного компонента іншим компонентом в рідкому стані, яку потім затверджували внаслідок полімеризації (ПММА) або охолодженням (сплав Вуда).