Description

trans-Polyoctenamer CAS NO 28730-09-8 is a synthetic, high molecular weight polymer derived from cyclooctene via ring-opening metathesis polymerization (ROMP). This unique material is valued for its excellent dynamic and mechanical properties, serving as a high-performance processing aid and modifier in rubber and polymer formulations. It is primarily utilized by manufacturers in the tire, specialty elastomer, and advanced polymer composite industries seeking to enhance product durability, processing characteristics, and material performance.

Application

• Tire Manufacturing: Acts as a reactive processing aid and compatibilizer in tire tread compounds to improve dispersion of fillers (like silica and carbon black), reduce rolling resistance, and enhance wet grip.
• Rubber Compounding: Used as a polymeric plasticizer and viscosity modifier in various rubber blends (e.g., NR, SBR, BR) to improve flow properties, reduce mixing energy, and facilitate extrusion and molding.
• Polymer Modification: Functions as a toughening agent and impact modifier in engineering plastics and thermoplastic elastomers (TPEs) to balance stiffness and toughness.
• Reactive Additive: Serves as a crosslinking co-agent or chain extender in peroxide-cured systems and reactive processing to tailor network structure and final properties.
• Adhesives and Sealants: Incorporated to modify rheology, enhance cohesion, and improve the flexibility and aging resistance of high-performance formulations.
• Bitumen Modification: Used to enhance the elasticity, high-temperature performance, and fatigue resistance of polymer-modified bitumen for road construction and roofing.

Basic Information

Product Name	trans-Polyoctenamer
CAS No.	28730-09-8
Molecular Formula	(C8H14)n
Molecular Weight	Varies (High Polymer)
Synonyms	Poly(trans-octenamer); Poly(1-trans-octenylene); trans-Polyoctenylene; Vestenamer® (Trade Name); Poly(oct-1-ene-1,8-diyl) (trans-); ROMP Polymer of Cyclooctene; trans-Poly(1-octene); Metathesis Polyoctenamer
EINECS	Contact for details

Quality Control

Our trans-Polyoctenamer is manufactured under controlled conditions to ensure batch-to-batch consistency and performance reliability. Quality is verified through a series of analytical tests including determination of trans-content, molecular weight distribution (GPC), and thermal analysis (DSC). A Certificate of Analysis (COA) detailing specific lot parameters is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and heat sources to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white granules/pellets
Trans Content	> 80 %
Mooney Viscosity (ML 1+4 @ 100°C)	Tailored (e.g., 30 - 80)
Melting Point (DSC)	~ 55 - 65 °C
Ash Content	< 0.5 %
Volatile Matter	< 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.