1. General Information
Product Name: Donor P
Chemical Name: Diisopropyldimethoxysilane, (DIPDMS)
Molecular Formula: C8H20O2Si
Molar Mass: 176.3 g/mol
2. Chemical Properties
Purity %: 99 Min
Moisture ppm: 100 Max
3. Physical Properties
Appearance: clear and transparent liquid
Boiling Point: 164°C / 760mmHg
Flash Point: The flash point of Donor P is 43 °C
4. Chemical Reactivity and Stability
Stability: Donor P is stable under normal storage conditions.
Reaction Mechanism: In polymerization reactions, especially in Ziegler – Natta catalyst systems, Donor P acts as an electron donor. It coordinates with the transition – metal center in the catalyst, modifying the catalyst’s structure and reactivity. This coordination is crucial for controlling the polymerization process.
5. Applications
Polymerization Industry
As an external electron donor in Ziegler – Natta catalyst systems: In the polymerization of polyolefins, Donor P is an important component of the catalyst system. It can improve the activity and selectivity of the catalyst, helping to increase the production efficiency of polypropylene and reduce production costs.
Regulating the molecular structure and properties of polymers: Donor P can affect the steric structure of the polymer by regulating the growth of polymer chains. It helps to control the tacticity of polypropylene, that is, to adjust the regularity of the arrangement of structural units in the polymer chain, so as to obtain polypropylene products with different performance characteristics.
Improving the performance of polymer products: The use of Donor P can make the produced polypropylene have better physical and mechanical properties, such as higher tensile strength, stiffness, heat resistance and impact resistance. These improved properties make polypropylene more competitive in the market and meet the higher requirements of different application fields for material performance.
6. Usage and Dosage
Usage: Donor P is typically used as an external electron donor in Ziegler – Natta catalyst systems for polymerization reactions, especially in the production of polyolefins like polypropylene. It is added to the polymerization reactor along with the catalyst and other reactants.
Dosage: The recommended dosage of Donor P usually falls within the range of 0.1 – 5.0 mmol per gram of catalyst in polymerization reactions. However, the specific dosage can vary based on multiple factors, such as the type of catalyst, the specific polymerization process, and the desired properties of the polymer product.
7. Advantages
High – Efficiency Catalyst Activation: Even at low dosages, Donor P can effectively activate and modify the Ziegler – Natta catalyst, enhancing the polymerization rate and improving the quality of the polymer product.
Precise Polymer Property Control: It allows for precise control over the properties of the polymer, such as molecular weight, molecular weight distribution, and stereochemistry.
Cost – Effectiveness: Considering its effectiveness in improving polymerization efficiency and product quality, Donor P offers a cost – effective solution.
8. Handling and Safety
Personal Protective Equipment: When handling Donor P, it is recommended to wear appropriate personal protective equipment, including chemical – resistant gloves, safety goggles, and protective clothing.
Ventilation: Ensure good ventilation in the handling area.
9. Packaging and Storage
Packaging: Usually packed in 200 – liter iron drums with an inner protective layer. Each drum contains 180 kg of Donor P. Additionally, the drums are filled with nitrogen to create an inert atmosphere, which helps maintain the chemical stability of Donor P during storage and transportation.
Storage: Store in a cool, dry place, away from direct sunlight and heat sources. Under proper storage conditions, it has a shelf – life of one year. Regularly inspect the stored product to ensure its quality and effectiveness before use in production processes.