Methyl acrylate（

Methyl acrylate ($C4H6O2 $) may undergo decomposition reactions under specific conditions. Please briefly describe the main types and possible products of its decomposition reaction, and explain the chemical principles of its decomposition reaction.
Answer: The decomposition reaction of methyl acrylate mainly includes thermal degradation and photodegradation. Thermal degradation may lead to random breakage of molecular chains, resulting in the formation of low molecular weight compounds, which can further decompose into acrylic acid and methanol; Photodegradation may trigger a chain depolymerization reaction, releasing methyl acrylate monomer or other photolysis products. The principles of chemistry involve high temperatures providing energy to break chemical bonds (thermal degradation), as well as the absorption of photon energy leading to intramolecular electron transitions and chemical reactions (photodegradation).
Analysis: This question examines the types, products, and chemical principles of the decomposition reaction of methyl acrylate. The decomposition reaction of methyl acrylate mainly includes two types: thermal degradation and photodegradation. During the thermal degradation process, the molecular chain of methyl acrylate may undergo random breakage, leading to a decrease in polymerization degree and the formation of low molecular weight compounds. These compounds may further decompose into simpler molecules such as acrylic acid and methanol. During the photodegradation process, methyl acrylate molecules may undergo a chain depolymerization reaction after absorbing light energy, directly releasing monomer molecules such as methyl acrylate monomer or generating other photolysis products. In terms of chemical principles, thermal degradation is mainly due to the high temperature providing energy, which breaks the chemical bonds in the molecular chain; Photodegradation, on the other hand, is caused by the absorption of photon energy by molecules, leading to electron transitions within the molecules and triggering chemical reactions. Both of these decomposition reactions are influenced by factors such as molecular structure, reaction conditions (such as temperature, light intensity), and the presence of catalysts or inhibitors. The key to solving the problem lies in understanding the molecular structure characteristics of methyl acrylate, as well as the basic principles of thermal degradation and photodegradation. The common mistake lies in the possibility of confusing the types of decomposition reactions or making inaccurate judgments about the decomposition products.