Activator 73 A Activator 73 LM Multifunctional cure activators for the sulfur vulcanization of diene rubber, especially natural rubber. They can partly or totally replace conventional activators based on fatty acids (stearic acid, zinc stearate, and zinc 2-ethylhexanoate) and impart excellent reversion resistance. They can also be used as an effective physical peptizer for the mastication of na...

Abstract Non-rubber components are critical in the formation of natural rubber (NR) vulcanization network, which leads to outstanding mechanical properties NR. This study reports effect NR endogenous proteins (C-serum protein/lutoid protein [CSP/LP]) on networks at molecular level. Results indicate that CSP/LP has a positive vulcanization. Fourier-transform infrared spectroscopy and X-ray photo...

In a light-emitting diode (LED) package, silicone encapsulant serves as chip protector and enables the light to transmit, since it exhibits advantages of high transmittance, refractive index, thermal stability. However, its reliability is still challenged under harsh operation conditions. this study, optical mechanical properties encapsulant, including appearance, Young’s modulus, tensile stren...

Regio- and stereoselectivity control in the polymerization of 1,3-conjugated dienes is much interest importance. We report herein for first time isospecific trans-1,4-selective living (E)-1,3-pentadiene (EPD) by a C5H5-ligated yttrium catalyst (C5H5)Y(CH2C6H4-NMe2-o)2/[Ph3C][B(C6F5)4], which afforded crystalline isotactic-trans-1,4-polypentadiene showing good elastic properties without vulcaniz...