To select appropriate storage conditions for optimal performance of the cured product of polysilazane, the following aspects can be referred to:
temperature control
Low temperature storage:
It is generally recommended to store polysilazane in a low-temperature environment, with an ideal temperature range typically between 5 ℃ and 15 ℃. Within this temperature range, the thermal motion of polysilazane molecules is relatively slow, which can effectively suppress their unnecessary chemical reactions, maintain their good stability and fluidity, and put them in a relatively 'dormant' state, providing a guarantee for subsequent operations according to the expected curing process. For example, some polysilazanes commonly used in the field of electronic packaging can be stored at low temperatures to prevent premature cross-linking reactions during storage, ensuring accurate curing during subsequent use and obtaining uniform and high-performance cured products.
Avoid high temperatures:
Polysilazane should be strictly avoided from being exposed to high temperature environments, such as temperatures above 30 ℃. High temperature can accelerate the movement of polysilazane molecules, which can easily trigger curing reactions such as cross-linking between internal functional groups, resulting in deviations in the properties of the cured product. For example, excessive cross-linking may occur at high temperatures, leading to increased brittleness and decreased flexibility of the cured product. Additionally, it may make the curing process difficult to control, resulting in an inability to achieve the expected degree of curing and performance requirements.
Humidification
Maintain a dry environment:
Polysilazane is best stored in a low humidity environment, with a relative humidity controlled below 30%. For polysilazanes containing easily hydrolyzed functional groups (such as silicon nitrogen bonds), a dry environment can effectively prevent water from undergoing hydrolysis reactions, avoiding unexpected solidification or the formation of hydrolysis products that affect performance during storage. For example, when storing polysilazane for aerospace coatings, keeping it dry can ensure that the subsequently cured coating has good corrosion resistance, adhesion, and high-temperature stability.
Moisture prevention measures:
Sealed packaging and placement of desiccants can be used to prevent moisture. Load the polysilazane into a container with good sealing performance (such as a plastic bucket or glass bottle with a sealing rubber ring), and place an appropriate amount of desiccant (such as silica gel desiccant) in the container. Regularly check the moisture absorption of the desiccant and replace it in a timely manner to ensure that the container is always kept dry and prevent external humid air from entering and affecting the stability of the polysilazane.
Light protection
Avoid light storage:
Choose a dark storage environment, such as placing polysilazane in a dark room or in a storage area wrapped with shading materials (such as black plastic film, shading cloth, etc.). Due to the sensitivity of some polysilazanes to ultraviolet light and other factors, light exposure can easily trigger free radical reactions, leading to premature crosslinking and solidification. Storing them in the dark can eliminate this influencing factor and ensure their chemical stability during storage. For some polysilazane used as protective coatings for optical devices, strict light avoidance storage can achieve optimal results in transparency, optical performance, and other aspects after subsequent curing.
Use a light shielded container:
If it is not possible to ensure that the overall storage environment is light shielded, containers with shading function can be preferred for storing polysilazane. For example, some dark colored plastic bottles or glass bottles with shading coatings inside can reduce the impact of light on polysilazane even in environments with certain light exposure, maintain its normal storage state, and facilitate the subsequent acquisition of ideal performance cured products.
Container selection
Material considerations:
Container materials that are chemically stable and not prone to chemical reactions with polysilazane should be selected. Common high-quality options include glass and polytetrafluoroethylene. Glass containers have good chemical inertness and will not release impurities to interfere with the stability and curing reaction of polysilazane; Polytetrafluoroethylene material not only has strong chemical stability, but also has good sealing and corrosion resistance, which can provide a stable storage "space" for polysilazane, ensuring that it is not affected by the container material during storage, thereby ensuring that the performance of the cured product meets expectations.
Sealing requirements:
The sealing of the container is crucial to ensure that it can completely isolate substances such as air and moisture from the outside world. A well sealed container can prevent external oxygen from entering and causing unnecessary oxidative cross-linking reactions, as well as avoid problems such as water infiltration leading to hydrolysis. For example, plastic drums with high-quality sealing gaskets or tightly sealed glass bottles can maintain a stable chemical environment inside when storing polysilazane, allowing it to react according to design requirements during subsequent curing, resulting in stable and reliable curing products.
Storage duration management
First in, first out principle:
Following the principle of "first in, first out" when using polysilazane, priority is given to products stored in the warehouse first. Because even under appropriate storage conditions, there may be some degree of performance changes in polysilazane over time. Although this change is relatively slow, in order to ensure that the cured product can achieve optimal performance, it is necessary to shorten its actual storage time as much as possible. Using it in the order of storage can help reduce the potential impact caused by long-term storage.
Regular testing:
Regularly conduct performance testing on stored polysilazane, such as detecting changes in viscosity, chemical activity, and other indicators. Through testing, it is possible to promptly detect any abnormal changes in the storage process of polysilazane, in order to take corresponding measures for adjustment (such as adjusting storage conditions or using products that are about to exceed their shelf life in advance), ensuring that the performance of the final cured product can reach the optimal level.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K.     
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.