The study on low-temperature elasticity of phenyl vinyl silicone Rubber (also known as methyl phenyl vinyl silicone rubber) is an important topic in the field of materials science. The following is a detailed analysis of its low-temperature elasticity study:

1. Overview of Phenyl Vinyl Silicone Rubber
Phenyl vinyl silicone Rubber is a product made by introducing methyl phenyl siloxane chain segments or diphenyl siloxane chain segments into the molecular chain of silicone rubber. This structural change destroys the regularity of the siloxane molecular structure, thereby reducing the crystallization temperature of the polymer, improving cold resistance, and enabling it to maintain elasticity at extremely low temperatures.

2. Study on Low-temperature Elasticity
Glass Transition Temperature (Tg)
The glass transition temperature of phenyl vinyl silicone is usually low, generally between -120°C and -110°C. This temperature is much lower than that of ordinary silicone rubber, allowing phenyl vinyl silicone to maintain good elasticity at low temperatures.
With the increase of phenyl content, the glass transition temperature of silicone rubber will increase slightly, but it will generally remain in a low range.
Crystallization Behavior
The crystallization behavior of phenyl vinyl silicone has an important influence on its low-temperature elasticity. The crystallization behavior of silicone rubber at different temperatures can be studied by methods such as dynamic mechanical thermal analysis (DMTA).
Studies have shown that phenyl vinyl silicone is not easy to crystallize at low temperatures, which helps to maintain its low-temperature elasticity. In addition, the introduction of phenyl can also reduce the crystallization temperature and crystallinity of silicone rubber, further improving its low-temperature performance.
Compression cold resistance coefficient
The compression cold resistance coefficient is one of the important indicators to measure the low-temperature elasticity of silicone rubber. Under low-temperature conditions, the higher the compression cold resistance coefficient of silicone rubber, the better its low-temperature elasticity.
Due to its unique molecular structure, phenyl vinyl silicone exhibits a higher compression cold resistance coefficient at low temperatures and can maintain good elastic properties.
Experimental research and results
Studies in recent years have shown that by adjusting the preparation process and formula of phenyl vinyl silicone, its low-temperature elastic properties can be further optimized. For example, phenyl vinyl silicone prepared by methods such as anionic ring-opening polymerization exhibits more excellent elastic properties at low temperatures.
Experimental data show that phenyl vinyl silicone can still maintain good elastic properties at -70°C or even lower temperatures, meeting the use requirements under extreme low temperature conditions.

3. Application fields
Due to its excellent low-temperature elastic properties, phenyl vinyl silicone is widely used in aerospace, military weapons, automotive industry, construction industry and other fields. In these fields, phenyl vinyl silicone is used as key components such as seals, thermal insulation materials, and waterproof materials, providing a strong guarantee for the stability and reliability of the product.

In summary, phenyl vinyl silicone exhibits excellent elastic properties at low temperatures, which is mainly due to its unique molecular structure and preparation process. Through further research and optimization, the low-temperature elastic properties of phenyl vinyl silicone can be further improved, and its application prospects in more fields can be expanded.