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首页> 外文期刊>Journal of Applied Polymer Science >Thermotropic glazings for overheating protection. II. Morphology and structure-property relationships
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Thermotropic glazings for overheating protection. II. Morphology and structure-property relationships

机译：热致玻璃，用于过热保护。二。形态和结构-属性关系

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摘要

This article completes a systematic strategy for formulation and optimization of thermotropic systems with fixed domains (TSFDs) for overheating protection purposes. Focus was on characterization of morphology and on revealing optimization potential. A comprehensive characterization of scattering domain size and shape was done applying optical microscopy and scanning electron microscopy. In general, scattering domains exhibited inappropriate size and/or shape for optimum overheating protection performance. Moreover, several TSFD displayed defects (vacuoles, voids) resulting from thermomechanical or physicochemical interaction of matrix material and thermotropic additive during manufacturing. Morphological features along with solar optical and thermorefractive properties allowed for establishment of structure-property relationships. Light-shielding efficiency of TSFD correlated well with scattering domain size and shape. The majority of TSFD showing defects exhibited an increase of solar hemispheric transmittance upon heating. Several strategies to overcome defect formation and to improve scattering morphology were suggested and proof of concept was shown partially, thus indicating a significant optimization potential of the established TSFD.
机译：本文完成了用于过热保护目的，具有固定域（TSFD）的热致系统的制定和优化的系统策略。重点是形态表征和揭示优化潜力。应用光学显微镜和扫描电子显微镜对散射域的大小和形状进行了全面的表征。通常，散射区域显示出不合适的尺寸和/或形状，以实现最佳的过热保护性能。此外，由于制造过程中基质材料和热致添加剂的热机械或物理化学相互作用，一些TSFD显示出缺陷（真空，空隙）。形态特征以及太阳光学和热折射特性允许建立结构-属性关系。 TSFD的遮光效率与散射域的大小和形状密切相关。表现出缺陷的大多数TSFD在加热时表现出太阳半球透射率的增加。提出了几种克服缺陷形成和改善散射形态的策略，并部分显示了概念验证，从而表明已建立的TSFD具有巨大的优化潜力。

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