Polymer coatings of nanometric thickness are about to enter in everyday life as part of a wide range of applications such as protective layers, stimuli-responsive membranes or as components of flexible electronics devices. In the past 30 years, these polymer nanomaterial systems have been at the center of research interest due to the opportunities to control relevant material properties like the phase transition temperature, viscosity, permeability, or thermal expansion by variation of the film thickness. One of the key factors responsible for the deviation from bulk behavior is known as 1D confinement that describes the increasing impact of interfacial layers when reducing film thickness. This review provides a comprehensive discussion of the role of the free surface at the boundary with air and the interfacial layer in proximity of a supporting substrate on the crystallization of thin polymer films. First, the dynamics of polymers near the free surface and its impact on the crystallization of films is discussed. Subsequently, the effect of solid substrates on crystallization in thin films is elaborated, including the formation of irreversible adsorption layers, alteration of crystalline structure and the kinetics of crystallization. Subsequently, the competition between surface and interface effects on the formation of ordered structures in thin polymer films is discussed. A perspective on challenges and opportunities in the field of thin film crystallization is provided to inspire future research and development in the field. This review thus provides an up-to-date analysis of current understanding of crystallization of polymer glasses under 1D confinement, aimed at supporting the manipulation and control of the properties of polymer-based nanodevices.

纳米厚度的聚合物涂层即将进入日常生活，作为保护层、刺激响应膜或柔性电子设备组件等广泛应用的一部分。在过去的 30 年中，这些聚合物纳米材料系统由于有机会控制相关材料特性（如相变温度、粘度、渗透性或热膨胀）而成为研究兴趣的中心通过薄膜厚度的变化。导致体行为偏差的关键因素之一被称为一维限制，它描述了当减小薄膜厚度时界面层的影响不断增加。本综述全面讨论了空气边界处的自由表面以及支撑基底附近的界面层对聚合物薄膜结晶的作用。首先，讨论了自由表面附近聚合物的动力学及其对薄膜结晶的影响。随后，详细阐述了固体基质对薄膜结晶的影响，包括不可逆吸附层的形成、晶体结构的改变和结晶动力学。随后，讨论了表面和界面效应之间对聚合物薄膜有序结构形成的竞争。提供了薄膜结晶领域挑战和机遇的视角，以启发该领域的未来研究和发展。因此，本综述提供了对一维约束下聚合物玻璃结晶的当前理解的最新分析，旨在支持基于聚合物的性能的操纵和控制纳米器件。