Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 200-207 |
| Journal | Polymer degradation and stability |
| Volume | 89 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2005 |
Keywords
- IR-77750
- 5-Ethylidene-2-norbornene
- Stability
- EPDM
- UV
- Dicyclopentadiene
- Degradation
- Ethylene–propylene–diene rubber
- Carbonyl
- METIS-229239
Cite this
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Effect of third monomer type and content on the UV stability of EPDM. / Snijders, Emile A.; Boersma, Arjen; van Baarle, Ben; Noordermeer, Jacobus W.M.
In: Polymer degradation and stability, Vol. 89, No. 2, 2005, p. 200-207.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Effect of third monomer type and content on the UV stability of EPDM
AU - Snijders, Emile A.
AU - Boersma, Arjen
AU - van Baarle, Ben
AU - Noordermeer, Jacobus W.M.
PY - 2005
Y1 - 2005
N2 - Various uncompounded ethylene–propylene–diene (EPDM) elastomers were photo-oxidized using standard Weather-O-Meter (WOM) aging and oxygen absorption measurements during UV irradiation. The influence of the type and amount of diene on the UV stability was investigated. FTIR (ATR) measurements of the carbonyl absorbance after WOM aging were comparable with the outcome of the oxygen absorption tests. Both techniques showed a decrease in UV stability with increasing diene content. In addition, EPDM containing 5-ethylidene-2-norbornene (ENB) as the third monomer showed a higher UV stability compared to EPDM containing dicyclopentadiene (DCPD) as the third monomer. Furthermore, a linear relation was found between the carbonyl absorbance after WOM aging and the third monomer content for DCPD- and ENB-containing EPDM samples with comparable ethylene/propylene (C2/C3) ratio. The microhardness (International Rubber Hardness Degree) and the Young's modulus of the various EPDMs as function of the WOM irradiation time showed a maximum. This maximum is the result of parallel photo-crosslinking and chain-scission reactions, the latter being dominant in the later stages of the oxidation process. Combining the results from the FTIR measurements with the Young's modulus showed that DCPD-containing EPDM has a higher propensity to crosslinking reactions compared to ENB-containing EPDM.
AB - Various uncompounded ethylene–propylene–diene (EPDM) elastomers were photo-oxidized using standard Weather-O-Meter (WOM) aging and oxygen absorption measurements during UV irradiation. The influence of the type and amount of diene on the UV stability was investigated. FTIR (ATR) measurements of the carbonyl absorbance after WOM aging were comparable with the outcome of the oxygen absorption tests. Both techniques showed a decrease in UV stability with increasing diene content. In addition, EPDM containing 5-ethylidene-2-norbornene (ENB) as the third monomer showed a higher UV stability compared to EPDM containing dicyclopentadiene (DCPD) as the third monomer. Furthermore, a linear relation was found between the carbonyl absorbance after WOM aging and the third monomer content for DCPD- and ENB-containing EPDM samples with comparable ethylene/propylene (C2/C3) ratio. The microhardness (International Rubber Hardness Degree) and the Young's modulus of the various EPDMs as function of the WOM irradiation time showed a maximum. This maximum is the result of parallel photo-crosslinking and chain-scission reactions, the latter being dominant in the later stages of the oxidation process. Combining the results from the FTIR measurements with the Young's modulus showed that DCPD-containing EPDM has a higher propensity to crosslinking reactions compared to ENB-containing EPDM.
KW - IR-77750
KW - 5-Ethylidene-2-norbornene
KW - Stability
KW - EPDM
KW - UV
KW - Dicyclopentadiene
KW - Degradation
KW - Ethylene–propylene–diene rubber
KW - Carbonyl
KW - METIS-229239
U2 - 10.1016/j.polymdegradstab.2004.12.003
DO - 10.1016/j.polymdegradstab.2004.12.003
M3 - Article
VL - 89
SP - 200
EP - 207
JO - Polymer degradation and stability
JF - Polymer degradation and stability
SN - 0141-3910
IS - 2
ER -