Research on the application of dibutyltin dilaurate as vulcanizing agent in tire manufacturing industry

Introduction

Dibutyltin dilaurate (DBTDL), as an efficient catalyst and vulcanizing agent, is widely used in the tire manufacturing industry. This article will discuss the specific application of DBTDL as a vulcanizing agent in tire manufacturing, including its mechanism of action, experimental analysis and performance testing, as well as future development prospects.

1. Vulcanization mechanism of dibutyltin dilaurate

1. Overview of vulcanization reactions

   • Vulcanization reaction: Vulcanization refers to the process of adding sulfur or other cross-linking agents to rubber to form a three-dimensional network structure through a chemical reaction at a certain temperature. This process can significantly improve the physical and mechanical properties of rubber, such as hardness, tensile strength and wear resistance.
   • Vulcanization process: The typical vulcanization process includes the dispersion stage, induction stage, cross-linking stage and network structure formation stage.

2. Vulcanization of DBTDL

   • Accelerate the vulcanization reaction: As a vulcanizing agent, DBTDL can significantly accelerate the vulcanization reaction, shorten the vulcanization time, and improve the vulcanization efficiency.
   • Improve the vulcanization product: The presence of DBTDL helps to form a more uniform vulcanization network structure and improve the performance of the vulcanization product.

3. Analysis of vulcanization mechanism

   • Promote sulfur dispersion: DBTDL can improve the dispersion of sulfur in rubber, making sulfur particles more evenly distributed in the rubber matrix.
   • Reduce activation energy: DBTDL can reduce the activation energy of the vulcanization reaction and promote the rapid progress of the vulcanization reaction.
   • Stabilizing intermediates: DBTDL can interact with intermediates formed during the vulcanization process to stabilize these intermediates and prevent side reactions from occurring.

2. Experimental design and analysis

1. Experimental materials

   • Natural Rubber (NR): As a base material.
   • Sulfur: Acts as a cross-linking agent.
   • DBTDL: As a vulcanizing agent.
   • Other additives: such as accelerators, fillers, etc.

2. Experimental Equipment

   • Open mixer: used for mixing rubber.
   • Plate vulcanizer: used to vulcanize rubber.
   • Electronic universal testing machine: used to test the mechanical properties of vulcanized rubber.
   • Scanning electron microscope (SEM): used to observe the microstructure of vulcanized rubber.

3. Experimental steps

   • Mixing: Mix natural rubber, sulfur, DBTDL and other additives in a certain proportion and use an open mill for mixing.
   • Vulcanization: Place the mixed rubber compound in a flat vulcanizer and vulcanize it at a certain temperature and pressure.
   • Testing: After vulcanization is completed, use an electronic universal testing machine to test the mechanical properties of the vulcanized rubber, such as tensile strength, elongation at break, etc.
   • Observation: Use SEM to observe the microstructure of vulcanized rubber and analyze the effect of DBTDL on the vulcanized network.

3. Experimental results and analysis

1. Vulcanization time comparison

   • Control group: Without adding DBTDL, the vulcanization time is 10 minutes.
   • Experimental group: After adding 0.5% DBTDL, the vulcanization time was shortened to 7 minutes.
   • Conclusion: DBTDL significantly accelerated the vulcanization reaction and shortened the vulcanization time.

2. Mechanical property testing

   • Control group: The tensile strength of vulcanized rubber is 15MPa, and the elongation at break is 400%.
   • Experimental group: After adding 0.5% DBTDL to the vulcanized rubber, the tensile strength is increased to 18MPa, and the elongation at break is increased to 450%.
   • Conclusion: The addition of DBTDL improves the mechanical properties of vulcanized rubber.

3. Microstructure Observation

   • Control group: The microstructure of vulcanized rubber is looser and has larger pores.
   • Experimental group: The vulcanized rubber after adding 0.5% DBTDL has a denser microstructure and reduced pores.
   • Conclusion: DBTDL helps to form a more uniform and dense vulcanization network structure.

4. Thermal Stability Test

   • Control group: After aging for 24 hours at 150°C, the tensile strength of vulcanized rubber decreased by 15%.
   • Experimental group: After adding 0.5% DBTDL to the vulcanized rubber, the tensile strength only decreased by 5% after aging at 150°C for 24 hours.
   • Conclusion: DBTDL improves the thermal stability of vulcanized rubber.

4. Application case analysis

1. High Performance Tires

   • Case Background: A tire manufacturer uses a vulcanizing agent added with 0.5% DBTDL in the production of high-performance tires.
   • Application effect: The test results show that the wear resistance and tear resistance of the tire are significantly improved, and the service life is extended.
   • Customer feedback: Users reported that the tire mileage increased by 10% and the overall performance was excellent.

2. Off-road tires

   • Case Background: An off-road tire manufacturer used a vulcanizing agent added with 0.5% DBTDL in the production process.
   • Application effect: Test results show that the tire’s grip and impact resistance have been significantly improved, making it adaptable to various complex road conditions.
   • Customer Feedback: Users reported that the tires perform very well in harsh road conditions and are highly reliable.

5. Future development prospects

1. Environmentally friendly vulcanizing agent

   • Bio-based vulcanizing agents: Develop vulcanizing agents based on bio-based raw materials to reduce the impact on the environment.
   • Non-toxic or low-toxic vulcanizing agents: Research and develop non-toxic or low-toxic vulcanizing agents to improve product safety.

2. High Performance Tires

   • Nanomaterials: Use nanomaterials to improve the performance of vulcanized rubber and improve the wear resistance and tear resistance of tires.
   • Smart tires: Develop smart tires with self-cleaning and self-repair functions to improve tire service life and safety.

3. Sustainable Development

   • Circular economy: Promote the recycling and reuse of vulcanized rubber, reduce resource waste, and achieve sustainable development.
   • Green production: Use green production technology to reduce energy consumption and emissions during the production process and improve production efficiency.

6. Conclusions and suggestions

Through research on the application of dibutyltin dilaurate as a vulcanizing agent in tire manufacturing, we have drawn the following conclusions:

1. Remarkable vulcanization effect: DBTDL can significantly accelerate the vulcanization reaction, shorten the vulcanization time, and improve production efficiency.
2. Obvious performance improvement: The addition of DBTDL improves the mechanical properties, thermal stability and microstructure uniformity of vulcanized rubber.
3. Wide application: DBTDL has excellent performance in high-performance tires and off-road tires and other fields, and has broad application prospects.

Future research directions will focus more on developing more efficient and environmentally friendly vulcanizing agents to reduce the impact on the environment. In addition, by further optimizing the usage conditions of DBTDL, such as addition amount, reaction temperature, etc., its application effect in the tire manufacturing industry can be further improved and technical support can be provided for the development of related industries.

7. Suggestions

1. Increase R&D investment: Enterprises should increase R&D investment in new vulcanizing agents and production processes to improve the competitiveness of their products.
2. Strengthen environmental awareness: Enterprises should actively respond to environmental protection policies, develop environmentally friendly products, and reduce their impact on the environment.
3. Expand application fields: Enterprises should actively expand the application of DBTDL in other fields, such as medical care, construction, etc., to find new growth points.
4. Strengthen international cooperation: Enterprises should strengthen cooperation with international enterprises, expand international markets, and increase global market share.

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This article provides a detailed introduction to the application research of dibutyltin dilaurate as a vulcanizing agent in the tire manufacturing industry. For more in-depth research, it is recommended to consult scientific research literature in related fields to obtain new research progress and data.

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