Nikitakos Vasilis, Porfyris Athanasios D, Beltsios Konstantinos, Papaspyrides Constantine, Bordignon Simone, Chierotti Michele R, Nejrotti Stefano, Bonomo Matteo, Barolo Claudia, Piovano Alessandro, Pfaendner Rudolf, Yecora Beatriz, Perez Angelica
Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece.
NIS Interdepartmental Centre, Department of Chemistry, University of Torino, 10125 Torino, Italy.
Polymers (Basel). 2023 Dec 19;16(1):10. doi: 10.3390/polym16010010.
Polyvinyl butyral (PVB) is widely used as an interlayer material in laminated glass applications, mainly in the automotive industry, but also for construction and photovoltaic applications. Post-consumed laminated glass is a waste that is mainly landfilled; nevertheless, it can be revalorized upon efficient separation and removal of adhered glass. PVB interlayers in laminated glass are always plasticized with a significant fraction in the 20-40% / range of plasticizer, and they are protected from the environment by two sheets of glass. In this work, the aim is to develop a thorough characterization strategy for PVB films. Neat reference PVB grades intended for interlayer use are compared with properly processed (delaminated) post-consumed PVB grades from the automotive and construction sectors. Methods are developed to open opportunities for recycling and reuse of the latter. The plasticizer content and chemical nature are determined by applying well-known analytical techniques, namely, FT-IR, TGA, NMR. The issue of potential aging during the life cycle of the original laminated material is also addressed through NMR. Based on the findings, a sensor capable of directly sorting PVB post-consumer materials will be developed and calibrated at a later stage.
聚乙烯醇缩丁醛（PVB）作为夹层材料在夹层玻璃应用中被广泛使用，主要应用于汽车行业，但也用于建筑和光伏应用。消费后的夹层玻璃是一种主要被填埋的废弃物；然而，在有效分离和去除附着的玻璃后，它可以被重新利用。夹层玻璃中的PVB夹层总是用20 - 40%范围内的大量增塑剂进行增塑，并且它们受到两片玻璃的保护而免受环境影响。在这项工作中，目标是为PVB薄膜开发一种全面的表征策略。将用于夹层的纯参考PVB等级与来自汽车和建筑行业经过适当处理（分层）的消费后PVB等级进行比较。开发方法以开辟回收和再利用后者的机会。通过应用著名的分析技术，即傅里叶变换红外光谱（FT - IR）、热重分析（TGA）、核磁共振（NMR）来确定增塑剂含量和化学性质。还通过核磁共振解决了原始夹层材料生命周期中潜在老化的问题。基于这些发现，后期将开发并校准一种能够直接对消费后的PVB材料进行分类的传感器。
