Factors Influencing the Surface Glass Transition Temperature of Polymer Films

Abstract
The molecular dynamic in Polymers is the foundation to determine the substantial excellent properties and features for the polymer materials. The dynamic behavior of the polymer motion possesses diversity and complexity, influenced by multiple factors including temperature, time scale, molecular weight. The mobile unit of which could be side chains, branch chains, chain segments, and even the whole complete molecular chain. The deep insight about the macromolecular dynamic forms is necessarily required by the material science region to facilitate the development of this subject. Consequently, it is extremely significant and meaningful to investigate polymer molecular dynamic for developing and designing excellent polymer materials as well as related complexed composite material occupied super merits.

Associated with the evolution of nano science and technology, the nano scale of the polymer materials has spread as prevalent trend that is universally investigated by scientists to resolve current technical issues and supply novel strategies. The physical characteristics and functionality of polymer nanomaterials are influenced by how polymer chains behave when confined in low-dimensional space. It is clear that researching the behavior of enclosed polymer chains and connecting the molecular dynamics to the physical characteristics of polymer nanomaterials is crucial for   enhancing the structure and performance for materials.

The conformation, condensed structure and dynamic properties of polymer chains deviate from bulk, renders size dependent after polymeric materials plunge into the dimension of polymer chains. Substantial specific merits or properties would been displayed due to the dynamic motion of the chain transport of nano-scaled polymer films. A large number of researched have demonstrated that the behavior of confined polymer at the nano-scale deviate from that of the materials in bulk with respect to rheological, mechanical, crystallization, and glass transition properties. A further deeper comprehension of the molecular dynamics properties of polymers in confinement is necessary to control the performance and achievement of polymer nanomaterials.