Improvement of the compatibility of natural rubber/ethylene–propylene diene monomer rubber blends via natural rubber epoxidation

Abstract

ABSTRACT:The longitudinal ultrasonic velocity, longitudinal ultrasonic absorption (attenuation coefficient), glasstransition temperature, and Mooney viscosity for epoxidized natural rubber/ethylene-propylene diene monomer blends were measured. The variation of the longitudinal ultrasonic velocity with the blend ratios was linear, indicating a compatible system in comparison with the same system without epoxidation (natural rubber/ethylene-propylene diene monomer), which was incompatible. Also, the behavior was confirmed by heat of mixing calculations as well as Mooney viscosity measurements.

Evaluation of the Effect of Polymeric Compounds as Compatibilizers for NR/EPDM Blend

“…Each of them has certain desirable physical and chemical properties which if combined in a blend would result in useful industrial products. Recently, Mounir, El-Sayed, and Afifi [4] epoxidized natural rubber and reported a compatible blend with EPDM. Methods determining the degree of compatibility have been reported, both theoretically and experimentally [5][6][7] .…”

Ultrasonic studies on polystyrene/styrene butadiene rubber polymer blends filled with glass fiber and talc

“…The simple measurements of ultrasonic velocity reveal various aspects of the compatibility of polymer blends in both highly viscous and solid form. Sidkey et al [15,16] concluded that the presence of only one maximum for attenuation-composition curve reflects the Recently, Afifi et al [17,18] used the ultrasonic velocities and attenuation coefficient to study the compatibility of the epoxidized natural rubber-ethylene propylene diene monomer (ENR-EPDM) blends using pulse echo technique at a frequency of 2 MHz. The relation between ultrasonic velocity and composition showed a curvilinear type of S shape and a region of phase in version was shown.…”

Ultrasonic properties of polystyrene‐based composites

“…Ultrasonic wave propagation for polymer characterization is a fast, nondestructive, and noninvasive technique based on low‐intensity ultrasound. The advantage of using ultrasound velocity measurements for investigating polymer compatibility has been shown by many workers 25–39. Ultrasound as a non‐destructive testing technique is normally associated with the detection of defects, cracking, pores etc.…”