Cross-Linkers for Improved High Temperature Performance of ROMP Adhesives

Autor: Jonathan L. Kendall, Christopher G. Keck, Kenneth C. Caster
Rok vydání: 2007
Předmět:
Zdroj: Advanced Synthesis & Catalysis. 349:165-174
ISSN: 1615-4169
1615-4150
Popis: Ring-opening metathesis polymerization (ROMP) has been shown to be an effective methodology to make adhesive bonds between various substrates. Excellent adhesion has been demonstrated on a variety of substrates including post-vulcanized elastomers, polyolefins, and metals. Strong adhesion results when one substrate surface is coated with the metathesis catalyst and the other substrate surface is coated with a ROMPable monomer. Concerns over using ROMP-based adhesion in dynamic applications where the bond-line could experience higher-than-ambient temperatures prompted this investigation. In this report, a variety of bis-norbornadiene cross-linkers were used to bond tire carcass, tire tread, post-vulcanized EPDM, and grit-blasted steel in a variety of self- and cross-bonded configurations. The resulting bonded assemblies were then evaluated using a 180° peel test in a temperature range from −40 °C to 66 °C at various cross-linker concentrations. Significant improvements in bond strength were observed at elevated temperature with little detrimental affect on low temperature strengths even at high cross-linker concentration. Self-bonding of polyolefins assemblies was also investigated. Addition of a peroxide radical initiator to the initial ROMP formulation and cross-linking the bonded assembly in a post-cure reaction was also found to lead to improved high temperature bond strength. Synthetic details for the preparation of several cross-linkers are reported.
Databáze: OpenAIRE
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