The low temperature compression cold resistance coefficient of phenyl vinyl silicone (also known as methyl phenyl vinyl silicone rubber) is one of the important indicators for studying its low temperature performance. This silicone rubber introduces phenyl groups on the side groups of polysiloxane, destroying the regularity of the dimethylsiloxane structure, thereby greatly reducing the crystallization temperature of the polymer and significantly improving its low temperature application range. The following is an overview of the study on the low temperature compression cold resistance coefficient of phenyl vinyl silicone:

1. Low temperature performance of phenyl vinyl silicone
Cold temperature range:
Phenyl vinyl silicone has excellent low temperature performance, especially when the phenyl content is moderate (such as 5% to 10% molar fraction), which is called low phenyl silicone rubber, which can still maintain good elasticity at low temperatures of -70℃ to -100℃.
Crystallinity:
Medium phenyl silicone rubber is a non-crystalline silicone rubber, and the crystalline melting temperature of low phenyl silicone rubber is lower than that of vinyl silicone rubber without phenyl, which helps it maintain elasticity at low temperatures.

2. Research on low temperature compression cold resistance coefficient
Test conditions:
The low temperature compression cold resistance coefficient is usually obtained after compression testing of silicone rubber samples under specific low temperature conditions (such as -60℃, -70℃, etc.). During the test, the sample will be subjected to a certain compressive force, and its ability to recover its shape will be measured after a certain period of time.

Research results:
Due to its special molecular structure, phenyl vinyl silicone shows a high compression cold resistance coefficient at low temperatures. This means that in a low temperature environment, the material can better maintain its shape and elasticity even when compressed.
In terms of specific values, due to different test conditions and sample formulations, the specific values of the low temperature compression cold resistance coefficient will vary. But in general, the compression cold resistance coefficient of low phenyl silicone rubber at -70℃ is significantly higher than that of vinyl silicone rubber without phenyl.