Carbon-Black Crosslinked Rubber for Ozone-Resistant Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cyclopentene ring-opening polymer-based rubbers lack sufficient ozone resistance, making them unsuitable for applications requiring this property.
Innovation Solution
A crosslinked rubber is produced by combining a cyclopentene ring-opening polymer with a predetermined amount of carbon black, specifically 20 to 200 parts by weight, and subjected to ozone treatment under controlled conditions to maintain a rate of change in tensile strength within ±70%, ensuring excellent ozone resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclopentene ring-opening polymer is used as alternative material for butadiene rubber, then production reliability is improved, but ozone resistance deteriorates
Solution Approach 1:
The patent creates a composite material system by combining cyclopentene ring-opening polymer with specific additives including sulfur (0.5-5 parts by weight), zinc oxide (1-10 parts by weight), and antioxidants. This composite approach allows the base polymer to maintain its production reliability benefits while the additives provide the missing ozone resistance protection.
Solution Approach 2:
The patent optimizes the composition parameters of the rubber compound, specifically controlling the ratios of sulfur (0.5-5 parts by weight relative to 100 parts polymer), zinc oxide (1-10 parts by weight), and antioxidant (0.1-5 parts by weight). By precisely adjusting these compositional parameters, the material achieves both production reliability and ozone resistance.
2Temperature
If cyclopentene ring-opening polymer is used for tire applications, then low heat generation property is improved, but ozone resistance deteriorates
Solution Approach 1:
The patent formulates a composite rubber compound that combines cyclopentene ring-opening polymer (maintaining low heat generation) with protective additives including sulfur, zinc oxide, and antioxidants. This composite structure enables the material to simultaneously achieve low heat generation properties for tire applications and sufficient ozone resistance through the protective additive system.
Solution Approach 2:
The patent applies local quality enhancement by adding specific protective components (sulfur, zinc oxide, antioxidants) to the cyclopentene polymer matrix. These additives are distributed throughout the material to provide localized ozone protection while the base polymer maintains its inherent low heat generation properties, creating a material with spatially differentiated functional characteristics.
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 resulting crosslinked rubber exhibits enhanced ozone resistance, making it suitable for applications where this property is critical, such as in various industrial and automotive uses.
Implementation Method 1
the crosslinked rubber, when subjected to an ozone treatment under specific conditions, having a rate of change in tensile strength before and after ozone treatment controlled within a specific range
Data Source
AI summary
Provided is a crosslinked rubber produced by crosslinking a polymer composition containing 100 parts by weight of a rubber component containing a cyclopentene ring-opening polymer and 20 to 200 parts by weight of carbon black, wherein, when the crosslinked rubber is subjected to an ozone treatment in which the rubber is maintained at 40°C and an ozone concentration of 50 pphm for 144 hours under a 20% tensile strain, the crosslinked rubber shows a rate of change in tensile strength before and after ozone treatment of within ±70%.