Silane Modifier for Conjugated Diene Polymer Filler Affinity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conjugated diene-based polymers used in tire rubber face challenges in achieving optimal affinity with fillers like silica, leading to poor dispersibility and insufficient coupling, which affects the tire's rolling resistance, wet skid resistance, and abrasion resistance.
Innovation Solution
A modifier represented by a specific chemical formula is introduced to enhance the affinity of conjugated diene-based polymers with fillers, improving their compounding properties and resulting in better tensile strength, abrasion resistance, rolling resistance, and wet skid resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silica is used as reinforcing filler, then low hysteresis loss and wet skid resistance are improved, but dispersibility is poor due to low affinity with rubber
Solution Approach 1:
A silane coupling agent is introduced as an intermediary substance between the hydrophilic silica surface and the hydrophobic rubber matrix. The silane coupling agent contains both silanol groups that bond with silica and organic functional groups that are compatible with rubber, thereby improving dispersibility and coupling without compromising wet skid resistance
Solution Approach 2:
The surface properties of silica are modified by changing its chemical parameters through silane treatment. The silane coupling agent alters the surface chemistry of silica, transforming it from highly hydrophilic to having balanced hydrophobic-hydrophilic characteristics, which improves compatibility with the rubber matrix while maintaining the low hysteresis loss property
2Adaptability or versatility
If solution polymerization is used, then vinyl structure content and styrene content can be arbitrarily adjusted, but coupling force with filler is insufficient without modification
Solution Approach 1:
Functional groups are introduced at the chain terminals of the polymer during the polymerization process itself, before the rubber is compounded with fillers. This preliminary functionalization ensures that the polymer chains are pre-equipped with coupling capabilities, enabling strong interaction with fillers like silica without requiring extensive post-polymerization modification
Solution Approach 2:
The polymer structure is designed as a composite system combining the base conjugated diene backbone with terminal functional groups that have specific affinity for fillers. This creates a multi-functional material that simultaneously provides the desired vinyl/styrene content for structure adjustment and the terminal functional groups for enhanced filler coupling
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 polymers exhibit improved processability and mechanical properties, including enhanced tensile strength, abrasion resistance, and reduced rolling resistance, while maintaining excellent wet skid resistance.
Implementation Method 1
having excellent affinity with a filler
Implementation Method 2
reducing hysteresis loss of vulcanized rubber
Data Source
AI summary
The present invention relates to a modifier useful for the modification of a conjugated diene-based polymer, having excellent affinity with a filler, and capable of improving the compounding properties of a conjugated diene-based polymer, a method for preparing the same, a modified conjugated diene-based polymer including the modifier, and a method for preparing the polymer.