Polyesters with built-in threshold temperature and deformation sensors
Polyesters with built-in threshold temperature and deformation sensors
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DOI：
10.1021/cm052186c
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发表时间：
2006-02-21
影响因子：
8.6
通讯作者：
Weder, C
中科院分区：
文献类型：
--
作者：
Kinami, M;Crenshaw, BR;Weder, C
聚酯和准分子形成的共混物的制备和表征，光致发光的1，4-双-（α-氰基苯乙烯基）-苯，其功能作为内置的变形或阈值温度传感器，进行了描述。通过熔融加工制备了聚对苯二甲酸乙二醇酯（PET）或聚对苯二甲酸乙二醇酯二醇（PETG）和少量（0.2- 2%w/w）的一系列传感器染料的二元共混物。这些材料的相行为可以通过组成、连接到染料上的溶解度控制取代基的性质和加工方案来控制。将适当处理的样品经受高于其玻璃化转变或机械变形的温度可以显着改变光致发光客体分子的分子聚集程度，这反过来又导致单体和受激准分子发射的贡献的变化。由于与这些跃迁相关的发射最大值可以相差多达138 nm，因此这种变化可以通过光谱手段容易地检测到，并且在许多情况下甚至可以通过肉眼检测到。
The preparation and characterization of blends of polyesters and excimer-forming, photoluminescent 1,4-bis-(alpha-cyano-styryl)-benzenes, which function as built-in deformation or threshold temperature sensors, are described. Binary blends of poly(ethylene terephthalate) (PET) or poly(ethylene terephthalate glycol) (PETG) and small amounts (0.2-2% w/w) of a series of sensor dyes were prepared by melt-processing. The phase behavior of these materials can be controlled via the composition, the nature of solubility-controlling substituents attached to the dyes, and the processing protocol. Subjecting appropriately processed samples to either temperatures above their glass transition or mechanical deformation can significantly change the extent of molecular aggregation of the photoluminescent guest molecules, which in turn leads to a variation of the contributions of monomer and excimer emission. Since the emission maxima associated with these transitions can differ by as much as 138 nm, this change can readily be detected by spectroscopic means and in many cases even by the unassisted eye.