Evaluation of Effect of Various Nanofillers on Technological Properties of NBR/NR Blend Vulcanized Using BIAT-CBS System

Abstract

Owing to processing ease and resistance to oils and chemicals, NBR is widely used in many industries. But since neat NBR has only poor tensile properties, it is better to use suitable blends of NR and NBR after incorporating appropriate nanoingredients before vulcanization. It is well established that nanoparticles can be easily dispersed in a more uniform pattern in polymer matrix, thereby enhancing the technological properties of the elastomer vulcanizate. Since there are no systematic comparative studies on technological properties of NBR/NR blend containing different nanoingredients, efforts have been made in this study to investigate cure and technological properties like tensile properties, tear resistance, compression set, hardness, abrasion loss and swelling value of NBR/NR (80/20) blend vulcanizates containing stearic acid-coated nano-zinc oxide (ZOS), nano-BIAT, nano-silicate-coated CaCO3, PEO-coated calcium silicate, and surface-modified carbon nanotubes (CNT). XRD and electron microscopy have been used for morphological analysis. The nano ingredients were effective in enhancing the technological properties of the vulcanizates. Among the nanofillers, modified CNT was found to impart superior properties to NBR/NR blend due to more intercalation.

Latex-Based Membrane for Oily Wastewater Filtration: Study on the Sulfur Concentration Effect

“…However, the % elongation of the membranes decreases when the sulfur loading increases. As membranes have more crosslinks, the rubber chain mobility will be restricted and the chains are unable to dissipate heat generated by deformation through molecular motion, resulting in easy and brittle rupture at low elongation [57].…”

Ketahanan n-pentana dan sifat mekanis vulkanisat karet perapat dari campuran karet alam/akrilonitril-butadiena dengan kompatibiliser

“…Parameter kelarutan CR sebesar 18,5 MPa 1/2 (Brandrup et al, 1998). CR memiliki struktur yang mirip dengan KA, namun lebih polar dikarenakan kandungan klorin (Thomas et al, 2013). Selain itu ada struktur dipole dalam unit berulang, memungkinkan CR berinteraksi dengan unit berulang akrilonitril di NBR (Thomas et al, 2012).…”

“…Gonzalez et al (2005) menyatakan bahwa nilai torsi maksimum dan delta torsi menunjukkan ikatan silang yang terbentuk dari sebuah kompon. Hal ini dikarenakan CR memiliki struktur yang mirip dengan KA, namun lebih polar (Thomas et al, 2013). Sedangkan reaksi epoksidasi pada KAE mengubah ikatan rangkap menjadi ikatan oksiran, dimana dengan berkurangnya jumlah ikatan rangkap tersebut menurunkan kemungkinan KAE berikatan silang dengan bahan pemvulkanisasi.…”

“…CR memiliki struktur yang mirip dengan KA, namun lebih polar dikarenakan kandungan klorin (Thomas et al, 2013 (Tosaka, 2007). Pampatan tetap merupakan salah satu parameter penting dalam karet perapat, semakin kecil pampatan tetap maka semakin baik vulkanisat tersebut digunakan untuk karet perapat.…”