Civil Aviation Resources Network April 7, 2015 news: March 30, Huangshan Airport security personnel in the implementation of FM9266 flight inspection tasks, passengers Zhao (female) alarm signal when passing through the security gate, the inspector immediately using the detector for personal After reviewing, the passenger was found to have a chest alarm. Careful inspectors ruled out the factors of the underwear steel hoop according to the strength of the alarm sound. They conducted a more rigorous manual search and finally discovered the “secret†in the passenger's underwear. The lighter is hidden inside. As a result of deliberate concealment, the passenger was handed over to the airport public security authority for further examination and handling. After learning that Zhao usually had a large amount of cigarette addiction, he felt that he was lucky enough to pass this method of hiding the lighter in a private place. Security personnel did not expect that the security personnel had discovered the “secret†in underwear. The security inspection department reminded passengers that it is strictly prohibited to carry lighters such as lighters, matches, etc. on civilian flights. For those who intentionally hide, they must also be punished by public security agencies. Curing agents, also known as hardeners, are essential components of many polymer systems, including Epoxy Resins. Curing agents react with the epoxy resin to form a three-dimensional crosslinked network, resulting in a cured polymer with improved mechanical properties, chemical resistance, and thermal stability. Curing Agent,Epoxy Curing Agent,Curing Agent Coating,Polyether Amines Shanghai Shengduan Trading Co., Ltd. , https://www.sdcuringagent.com
There are several types of curing agents, each with its own unique properties and applications. The most common type is amine-based curing agents, which react with the epoxy functional group to form a secondary amine and an alcohol. This reaction is exothermic and can be accelerated by heat, making it ideal for high-temperature applications.
Another type of curing agent is anhydride-based, which react with the epoxy group to form a cyclic acid anhydride and a hydroxyl group. These curing agents are typically used in applications where water resistance is critical, such as marine coatings and adhesives.
Other types of curing agents include phenolic, acid, and catalytic curing agents. Phenolic curing agents are used in high-temperature applications, while acid curing agents are used in low-temperature applications. Catalytic curing agents are used to accelerate the curing process and are typically used in combination with other curing agents.
The choice of curing agent depends on the specific application requirements, such as cure time, cure temperature, and final properties of the cured polymer. It is important to choose the correct curing agent to ensure that the final product meets the desired specifications.
In summary, curing agents are essential components of many polymer systems, including epoxy resins, and play a critical role in improving the mechanical, chemical, and thermal properties of the cured polymer. The choice of curing agent depends on the specific application requirements and must be carefully considered to ensure the final product meets the desired specifications.