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

2. 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:

3. 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?

4. 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)

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

6. 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?

7. Broadband Dielectric Spectroscopy (BDS)

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

9. 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

10. 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

11. 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

12. POSITRON ANNIHILATION LIFETIME SPECTROSCOPY

13. WHAT IS MEASURED?

14. HOW DOES IT WORK?

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

16. 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 in polymers.
∆R (0.166 nm): annihilation of o-Ps with the electrons takes place in this area

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

18. ADDITION OF TDAE TO BR
BR_10 phr
BR_No Oil
BR_20 phr

19. 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

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

21. 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

22. 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?

23. THANK YOU FOR YOUR ATTENTION!

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

25. 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