EFFECT OF “SAFE” AROMATIC OIL ON DYNAMICS OF S-SBR/BR (50/50) BLENDS AKANSHA RATHI

WHY is it important? EFFECT ON COMPOUND PROPERTIES: EC No 552/2009 – Shift from Distillate Aromatic Extract (DAE) to lower PAH process oils: Treated Distillate Aromatic Extract (TDAE), Mildly Extracted Solvate (MES). EFFECT ON COMPOUND PROPERTIES:

IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR?

POSITRON ANNIHILATION LIFETIME SPECTROSCOPY (PALS) DYNAMIC MECHANICAL ANALYSIS (DMA) BROADBAND DIELECTRIC SPECTROSCOPY (BDS) DIFFERENTIAL SCANNING CALORIMETRY (DSC) NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY (NMR) SMALL-ANGLE NEUTRON SCATTERING (SANS)

DIFFERENTIAL SCANNING CALORIMETRY COMMONLY USED S-SBR/BR BLENDS FOR SILICA REINFORCED TIRES HAVE A SINGLE TG DYNAMIC MECHANICAL ANALYSIS

IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR?

Broadband Dielectric Spectroscopy (BDS)

HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR?

IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR? BDS

DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? BR-rich segments Blend *A. Rathi, et al., J. Polym. Sci., Part B: Polym. Phys. 2018

IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? BDS DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR? BDS

POSITRON ANNIHILATION LIFETIME SPECTROSCOPY

WHAT IS MEASURED?

HOW DOES IT WORK?

What happens on addition of oil? ADD OIL S-SBR ADD OIL

FRACTIONAL FREE volume ∆𝐑 𝟐𝐑 Io-Ps associated with number of free volumes V h average volume of nano-holes ( v h = 4 3 π R 3 ) Fractional free volume (Fv) ∝ Number of free volumes (~ Io-Ps) . v h Leads to following semi-empirical equation: Fv=A v h I o−Ps A is a proportionality constant. It is estimated to be 0.0018 in polymers. ∆R (0.166 nm): annihilation of o-Ps with the electrons takes place in this area

ADDITION OF TDAE TO S-SBR SBR_No Oil SBR_10 phr SBR_20 phr

ADDITION OF TDAE TO BR BR_10 phr BR_No Oil BR_20 phr

WHAT was found? BR_No Oil Fv = 0.010 BR_10 phr TDAE Fv = 0.011 SBR_No Oil Fv = 0.031 SBR_10 phr TDAE SBR_20 phr TDAE Fv= 0.033

ADDITION OF TDAE TO S-SBR/BR blends S-SBR/Br_no oil S-SBR/Br_10 phr S-SBR/Br_20 phr

IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? Blend_No Oil Fv = 0.021 Blend_10 phr TDAE Fv = 0.024 Blend_20 phr TDAE Fv= 0.027 BR-rich_No Oil Fv = 0.015 BR-rich_10 phr TDAE Fv = 0.017 BR-rich_20 phr TDAE Fv = 0.019

PALS IS THE EFFECT OF THE OIL IN AGREEMENT WITH THE THEORY OF PLASTICIZATION? BDS DOES IT HAVE PREFERENCE FOR ONE OF THE BLEND COMPONENTS: S-SBR OR BR? HOW DOES THE OIL EFFECT THE BLEND COMPONENTS: S-SBR AND BR?

THANK YOU FOR YOUR ATTENTION!

Mixing formulation COMPONENT AMOUNT (phr) S-SBR 50 BR ZnO 4 Stearic Acid 3 CBS 2.5 Sulphur 1.6 TDAE 0/10/20

e ∆𝐑 2𝐑 Free volume e+ source e+ e- ∆R (0.166 nm): annihilation of o-Ps with the electrons takes place in this area