Vegetable Oil-Extended Diene Polymer for Tire Wear and Processability
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Solution Overview
Problem
Existing rubber materials for tires, such as petroleum-based oil-extended SBR, face environmental issues and lack eco-friendliness while requiring improved properties like abrasion resistance, tensile properties, and processability.
Innovation Solution
An oil-extended modified conjugated diene-based polymer is developed by incorporating a vegetable oil-derived unit and an aminoalkoxysilane-based modifier, with specific glass transition temperatures and atomic contents, enhancing tensile properties and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If petroleum-based oil is used to extend SBR polymer, then processability is improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent changes the chemical composition parameter by replacing petroleum-based oil with vegetable oil-derived units in the polymer structure. This substitution maintains the oil-extended properties (improved processability) while eliminating the environmental harm associated with petroleum-based oils, thus resolving the contradiction between processability and environmental friendliness.
Solution Approach 2:
The patent creates a composite polymer structure combining conjugated diene-based polymer chains with vegetable oil-derived units. This composite approach allows the polymer to exhibit both the processability benefits of oil-extended polymers and the environmental advantages of using renewable vegetable oil resources, thereby resolving the contradiction.
2Reliability
If vinyl content is increased to control glass transition temperature, then running resistance is improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent optimizes the vinyl content parameter within a specific range (20-60 wt%) to achieve the desired balance between glass transition temperature control (affecting running resistance) and abrasion resistance. By precisely controlling this parameter rather than maximizing it, the patent resolves the contradiction between these two opposing requirements.
3Strength
If chain terminals are coupled to increase coupling force with filler, then tensile properties are improved, but processability deteriorates
Solution Approach 1:
The patent introduces aminoalkoxysilane-based modifiers that react with chain terminals during or after polymerization. This preliminary modification creates functional groups that enhance coupling force with fillers like silica, thereby improving tensile properties while the oil-extended structure maintains processability, resolving the contradiction between these two properties.
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 polymer exhibits excellent tensile properties, abrasion resistance, and processability, addressing environmental concerns by using eco-friendly vegetable oil and improving rolling resistance.
Implementation Method 1
a modified polymer chain comprising a repeating unit derived from a conjugated diene-based monomer and a functional group derived from an aminoalkoxysilane-based modifier
Implementation Method 2
at least one of the modified polymer chain is coupling bonded with the derived unit from a vegetable oil
Implementation Method 3
an oil-extended modified conjugated diene-based polymer which has excellent processability, abrasion resistance, tensile properties
Data Source
AI summary
The present invention relates to an oil-extended modified conjugated diene-based polymer having excellent tensile properties and abrasion resistance, a method for preparing same and a rubber composition including same, and provides an oil-extended modified conjugated diene-based polymer including a modified polymer chain including a repeating unit derived from a conjugated diene-based monomer and a functional group derived from an aminoalkoxysilane-based modifier; and a derived unit from a vegetable oil, wherein at least one of the modified polymer chain is coupled with the derived unit from vegetable oil, N and Si atoms are included in 100 ppm or more each based on a total weight of the polymer, two glass transition temperatures of Tg1 and Tg2 measured by differential scanning calorimetry (DSC) are shown, Tg1 is −80° C. to −20° C., Tg2 is −50° C. to 30° C., and Tg2 is higher than Tg1, a method for preparing same and a rubber composition including same.