ELASTOMERY - quarterly

Quarterly

„Elastomery” is a Polish scientific and technical journal covering the field of chemistry, technology and processing of elastomers and polymers. It is addressed to scientists, managers and engineering staff of universities, R&D institutions, industry, specializing in rubber and elastomers.
The journal is one of the most important Polish technical journals, It has been published since 1996. It is scored by Polish Ministry of Science and Higher Education. „Elastomery” has been abstracted and indexed by several databases, e.g. BAZTECH, Index Copernicus (Poland) and by „Chemical Abstracts” (USA); „RAPRA-Abstracts” (UK).
Authors come from many countries, e.g. France, Germany, India, Russia, Slovakia, Ukraine and Poland.
Members of Editorial Board are leading specialists in the field of rubber, elastomers and polymers, from Polish as well as foreign institutions.
Publications are in Polish or in English. Titles, Abstracts, Keywords, Table and Figure titles are both in Polish, and in English.

„Elastomery” publishes, in Polish or in English:

  • Original, reviewed research, scientific and technology papers in the field of rubber, elastomers and polymers synthesis, analysis, technology and modification, processing, properties, applications and recycling
  • Current information on technical novelties and inventions in the field of rubber, elastomers and polymers, sourced from foreign and Polish publications
  • Unique information relating to the Polish rubber, plastics and chemical industry
  • Announcements and reports on fairs, conferences and scientific symposia
  • Information on people, universities and corporations in the rubber sector

In the Newest Issue…

Nr 3(120), Vol. 23(2019)

Elastomery nr 3/2019 cover

Anna Dziemidkiewicz, Magdalena Maciejewska

The influence of basic environment on the efficiency of Heck reaction applied for crosslinking chloroprene rubber

The aim of the study was to determine the efect of triethanolamine (TEOA) on the efficiency of Heck’s reaction used for the crosslinking of chloroprene rubber (CR). The proposed crosslinking system is a new example of the application of the Heck reaction, well known in organic synthesis. This reaction is one of the main methods of creating carbon carbon double bonds (C=C) in organic synthesis. So far, no use of Heck’s reaction in elastomer technology has been reported.
Rubber blends containing iron(II) acetylacetonate (Fe(acac)2) as a new crosslinking agent with different TEOA content (1-5 phr) were prepared. Additionally, the blends were filed with pyrogenic silica (SiO2) Aerosil 380 or carbon black (CB) N 550. The obtained results showed that both the amount of TEOA and the type of filer had a significant efect on the properties of the elastomers obtained. In case of composites filed with CB, the activity of Fe(acac)2 in the crosslinking process increased with the amount of TEOA. This was confirmed by high values of torque increment and degree of crosslinking of CR and shorter vulcanization times. In case of rubber compounds filed with SiO2, the efect of TEOA on the eficiency of crosslinking process was not so unambiguous. However, considering the increase in torque, the degree of crosslinking and the optimum vulcanization time, it can be stated that the use of 3 phr. TEOA resulted in the highest Fe(acac)2 activity.
The article in PDF file

Michele Scacchi

Different techniques to detect long chain branching in polymers by nonlinear viscoelastic characterization

It is well known that the presence of long chain branching (LCB) in a polymer has a large impact on his viscoelastic properties and can affect signifficantly the processability of filed rubber compound (black incorporation time, die swell, extrusion behaviour). Despite the influence of the molecular architecture of polymer on viscoelastic properties is usually investigated by the linear viscoelastic (LVE) characterization, this approach is not enough to disclose information on complex branching patterns and for fully understanding the processing behavior of elastomers. In this study, three different techniques are used for the characterization of the non linear response of polymers to detect the long chain branching. One of the most common ways in shear to assess the LCB in a raw elastomer is to determine the damping function. Taking advantage of the separability of the non linear stress relaxation modulus, G(t,γ), the damping function can be directly determined by stress relaxation experiments, with increasing strain amplitude. By comparing the damping function of the investigated polymer with the damping function of the Doi Edwards’s model, it is possible to assess the level of LCB in the polymer.
One of the most sensitive techniques to detect the LCB in a polymer is the FT Rheology by means of large amplitude oscillatory shear (LAOS) test. Lissajou figure and suitable LCB indexes are used to check the presence and to quantify the level of LCB in several raw rubbers. This technique can be used for quality control in the synthetic rubber production to check the polymer architecture. Another interesting way to characterize complex branching patterns is performing shear startup measurements on a variable speed Mooney rheometer equipped with a biconical rotor. The transient response of highly branched elastomers (e-SBR, NBR, PBR) allows to detect the presence of multiple overshoots, which are related to the characteristic molecular structure and can be used as a fingerprint of the kind of polymer architecture.
The article in PDF file

Contents in PDF file