Polyolefin-ROMP Composite Bonding for Consistent Adhesion
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Solution Overview
Problem
Existing methods for preparing articles with a polyolefin component and a polymer made by ring-opening metathesis polymerization of cyclic olefin monomers lack reliable and consistent adhesion, which is crucial for industrial applications.
Innovation Solution
A method involving pre-treating the polyolefin surface and applying a ring-opening metathesis polymerizable mixture with a catalyst, ensuring a viscosity of 1000 mPa·s at 30°C for more than 9 seconds, followed by curing, to achieve strong and consistent adhesion between the components, preferably through injection molding for high-quality results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring-opening metathesis polymerisable mixture is applied to bond a polyolefin component with a polymer component, then adhesion between the components is achieved, but the adhesion level is inconsistent and insufficient for industrial applications
Solution Approach 1:
The patent applies parameter changes by carefully controlling the viscosity of the ring-opening metathesis polymerisable mixture (maintaining >9 seconds at 1000 mPa·s at 30°C) and optimizing the catalyst system (molybdenum or tungsten-based) to achieve consistent and reliable adhesion between polyolefin and polymer components, transforming the unreliable bonding process into a controlled and predictable industrial operation
2Strength
If the viscosity of the ring-opening metathesis polymerisable mixture is increased to improve adhesion, then bonding strength increases, but the working time and ease of application decrease
Solution Approach 1:
The patent optimizes the viscosity parameter of the ring-opening metathesis polymerisable mixture to maintain a balance between adhesion strength and workability. By specifying a viscosity range (>9 seconds at 1000 mPa·s at 30°C), the invention ensures sufficient flow and application ease while maintaining high adhesion strength upon curing
3Reliability
If pre-treatment of the polyolefin surface is applied to improve adhesion, then bonding reliability increases, but the manufacturing complexity and time increase
Solution Approach 1:
The patent applies preliminary action by implementing surface pre-treatment of the polyolefin component before applying the ring-opening metathesis polymerisable mixture. This pre-treatment (such as corona treatment, plasma treatment, or chemical etching) activates the polyolefin surface to improve subsequent adhesion reliability, ensuring consistent bonding in industrial applications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method provides a consistently higher level of adhesion between the polyolefin and the polymerized component, ensuring cohesive failure rather than adhesive failure, and enhances the article's ability to withstand high water pressures.
Implementation Method 1
a second component of a polymer made by ring-opening metathesis polymerisation of cyclic olefin monomers
Implementation Method 2
applying a ring-opening metathesis polymerisable mixture of cyclic olefin monomers and a catalyst to the surface
Data Source
AI summary
A method for preparing an article includes at least a first component of a polyolefin in conjunction with a second component of a polymer made by ring-opening metathesis polymerisation of norbornene type monomers. The method includes pre-treating a surface of the first component, applying a ring-opening metathesis polymerisable mixture of norbornene type monomers and a catalyst to the surface, and curing the ring-opening metathesis polymerisable mixture in contact with the surface, wherein the ring-opening metathesis polymerisable mixture has a η1000 at 30° C. of more than 9 sec. Articles such as a pipe line field joint or a protective element for a concrete tunnel lining element can be made using the method.