Modified natural rubber, rubber composition using same, and method for producing modified natural rubber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current rubber technologies do not adequately enhance the low-fuel consumption performance and tensile strength of natural rubber polymers.
Innovation Solution
A modified natural rubber is produced by oxidizing polyisoprene and introducing a linking structure formed by binding polyisoprene units to an amino compound with primary amino groups, which increases the molecular weight and entanglement of the polymer chains, thereby improving tensile strength and compatibility with fillers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional modification methods (oxidation + single amino group addition) are used, then low cost is achieved, but tensile strength and low-fuel consumption performance are insufficient
Solution Approach 1:
The invention changes the chemical structure parameter by introducing a specific linking group containing a primary amino group with a particular molecular formula into the polyisoprene backbone. This structural parameter change enables both cost-effectiveness and enhanced tensile strength by creating optimal intermolecular interactions without requiring complex multi-step modifications.
Solution Approach 2:
The invention creates a composite structure by incorporating the amino-containing linking group within the polyisoprene backbone, forming a hybrid molecular architecture that combines the elasticity of polyisoprene with the strength-enhancing properties of the amino group, achieving superior mechanical properties.
2Device complexity
If conventional modification methods are used, then simple processing is achieved, but low-fuel consumption performance is insufficient
Solution Approach 1:
The invention modifies the chemical composition parameter of the rubber polymer by incorporating amino groups at specific intervals in the backbone, which fundamentally changes the material's energy dissipation characteristics and reduces fuel consumption during tire operation without complicating the modification process.
3Reliability
If filler compatibility is enhanced through conventional methods, then filler-rubber bonding is improved, but overall physical property enhancement is limited
Solution Approach 1:
The invention changes the chemical surface parameter of the rubber by introducing amino groups that can form strong interactions with filler surfaces, significantly enhancing filler compatibility and thereby improving overall physical properties including tensile strength, elongation, and abrasion resistance.
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 modified natural rubber exhibits superior low-fuel consumption performance and tensile strength compared to unmodified natural rubber, with enhanced compatibility with fillers, leading to improved rubber compositions for tire applications.
Implementation Method 1
adding an oxidizing agent to a natural rubber polymer to oxidize and cleave a carbon-carbon double bond
Implementation Method 2
adding an amino compound having two or more primary amino groups to the resulting oxidatively decomposed natural rubber polymer to cause the oxidatively decomposed natural rubber polymer to undergo a recombination reaction
Data Source
AI summary
A modified natural rubber includes a linking structure represented by general formula (C), the linking structure having been formed by allowing polyisoprene, having a structure represented by general formula (A) and/or general formula (B), to bind in the structure to an amino compound having two or more primary amino groups. In the formulae (A) and (B), X represents a hydrogen atom or a methyl group, and Ps represent a polyisoprene unit. In the formula (C), W represents a residue of the amino compound from which amino end groups are removed, and Q represents at least one selected from the group consisting of general formulae (Q-1) to (Q-4), and m represents 2 to 4. In the general formulae (Q-1) to (Q-4), *1 indicates binding to a carbon atom of a polyisoprene unit, and *2 indicates binding to a carbon atom of the residue represented by W.