What happens if DPG is present in a rubber compound?

ity of the rubber when there is DPG in the compound.When the DPG is present, there is an overall low r silica filler flocculation in the rubber compound. Looking at the viscosity of the rubber before vulcaniza-tion takes place, you can see that the DPG compounds have a lo er viscosity than the compound with no DPG (Fig. 6). This i

Why is DPG used in silica-reinforced rubber compounds?

Further, while reacting with the silanol groups DPG reduces the polarity of silica by being adsorbed onto the silica surface [, , ]; and finally, DPG is also capable of accelerating the silanization reaction [2, 4, 7, 8]. DPG therefore has turned into a multi-purpose compounding ingredient in silica-reinforced rubber compounds.

What is the role of 1,3-diphenyl guanidine in silica-reinforced rubber compounds?

The aim of this study was to evaluate the various roles of 1,3-DiPhenyl Guanidine (DPG) in silica-reinforced rubber compounds. Two roles of DPG are well known to be: adsorption onto silica surface to reduce the acidic sites and second to boost the silanization reaction as secondary accelerator. However, these two roles are in a way conflicting.

What is diphenyl guanidine (DPG)?

Diphenyl guanidine (DPG) is an essential ingredient in silica-reinforced rubber compounds for low rolling resistance tires, as it not only acts as a secondary accelerator, but also as a catalyst for the silanization reaction.

What is DPG chemistry in silica compounds?

er-filler network.DPG chemistry in silica compoundsDPG or N, N’-Diphenylguanidine is normally characterized as a secondary accelerator for atural rubber and styrene butadiene rubber (Fig. 1). This accelerator begins to melt around 145°C and begins to decompose around 140°C. DPG decomposes in

Does 1 3 diphenyl guanidine affect vulcanization in silica-reinforced rubber?

This induces faster filler-polymer coupling, more bound rubber but slower vulcanization and lower crosslink density. DPG and TESPT are partly consumed during mixing and alter the network structure. The aim of this study was to evaluate the various roles of 1,3-DiPhenyl Guanidine (DPG) in silica-reinforced rubber compounds.