Effect of third monomer type and content on the UV stability of EPDM

Emile A. Snijders, Arjen Boersma, Ben van Baarle, Jacobus W.M. Noordermeer

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

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.
Original languageUndefined
Pages (from-to)200-207
JournalPolymer degradation and stability
Volume89
Issue number2
DOIs
Publication statusPublished - 2005

Keywords

  • IR-77750
  • 5-Ethylidene-2-norbornene
  • Stability
  • EPDM
  • UV
  • Dicyclopentadiene
  • Degradation
  • Ethylene–propylene–diene rubber
  • Carbonyl
  • METIS-229239

Cite this

Snijders, Emile A. ; Boersma, Arjen ; van Baarle, Ben ; Noordermeer, Jacobus W.M. / Effect of third monomer type and content on the UV stability of EPDM. In: Polymer degradation and stability. 2005 ; Vol. 89, No. 2. pp. 200-207.
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abstract = "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.",
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year = "2005",
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volume = "89",
pages = "200--207",
journal = "Polymer degradation and stability",
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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 journalArticleAcademicpeer-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 -