Working fire in Chicago, 1-20-20

Photos from Tim Olk capturing a working fire in Chicago on January 20, 2020, at 121 W. 113th Place. These images provide a powerful visual account of the emergency response and the intensity of the situation. The first photo shows an E-ONE fire engine arriving at the scene, ready to assist in the firefighting efforts. Another image highlights the cold winter conditions as firefighters work through the harsh weather to contain the blaze.

A dramatic shot captures a firefighter standing in a window of the burning house, clearly visible against the flames. This moment reflects both the danger and the bravery involved in such emergencies. Additional photos show firefighters going through the process of overhaul after the fire was brought under control, ensuring that no hidden embers remain. These images offer a behind-the-scenes look at the critical work done by emergency responders following a house fire.

Tim Olk photo

Tim Olk photo

Tim Olk photo

Tim Olk photo

Tim Olk photo

Auxiliary Agent

Auxiliary agents, also known as additives, are substances that are added to a material to improve or modify its properties. In the field of polymers, auxiliary agents are commonly used to enhance the processing, performance, and durability of polymer materials.

There are several types of auxiliary agents, each with its own unique properties and applications. The most common type is processing aids, which are added to polymer materials to improve their flow and moldability during processing. Processing aids can improve the surface finish of the final product and reduce the amount of energy required during processing.

Another type of auxiliary agent is plasticizers, which are added to polymer materials to increase their flexibility and reduce their brittleness. Plasticizers can improve the toughness and impact resistance of the final product and are commonly used in the production of flexible PVC products, such as hoses and films.

Other types of auxiliary agents include stabilizers, which are added to polymer materials to protect them from degradation caused by heat, light, or chemical exposure. Stabilizers can improve the durability and longevity of the final product and are commonly used in outdoor applications, such as building materials and automotive parts.

Colorants, fillers, and flame retardants are also common types of auxiliary agents. Colorants are added to polymer materials to give them a specific color, while fillers are added to improve the mechanical properties of the final product, such as its strength and stiffness. Flame retardants are added to polymer materials to reduce the risk of fire and are commonly used in applications where fire safety is critical, such as building materials and electronics.

The choice of auxiliary agent depends on the specific application requirements and must be carefully considered to ensure that the final product meets the desired specifications. It is important to select the appropriate auxiliary agent to achieve the desired performance, processing, and durability characteristics of the polymer material.

In summary, auxiliary agents play an important role in the processing, performance, and durability of polymer materials. There are several types of auxiliary agents, each with its own unique properties and applications, and the choice of auxiliary agent depends on the specific application requirements.

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