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The Effect of Curing Temperature and Time on the Acoustic and Optical Properties of PVCP.
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control ( IF 3.6 ) Pub Date : 2019-10-14 , DOI: 10.1109/tuffc.2019.2947341
Marina Bakaric , Piero Miloro , Bajram Zeqiri , Ben T Cox , Bradley E Treeby

Polyvinyl chloride plastisol (PVCP) has been increasingly used as a phantom material for photoacoustic and ultrasound imaging. As one of the most useful polymeric materials for industrial applications, its mechanical properties and behavior are well-known. Although the acoustic and optical properties of several formulations have previously been investigated, it is still unknown how these are affected by varying the fabrication method. Here, an improved and straightforward fabrication method is presented, and the effect of curing temperature and curing time on the PVCP acoustic and optical properties, as well as their stability over time, is investigated. The speed of sound and attenuation were determined over a frequency range from 2 to 15 MHz, while the optical attenuation spectra of samples were measured over a wavelength range from 500 to 2200 nm. The results indicate that the optimum properties are achieved at curing temperatures between 160 °C and 180 °C, while the required curing time decreases with increasing temperature. The properties of the fabricated phantoms were highly repeatable, meaning that the phantoms are not sensitive to the manufacturing conditions provided that the curing temperature and time are within the range of complete gelation-fusion (samples are optically clear) and below the limit of thermal degradation (indicated by the yellowish appearance of the sample). The samples' long-term stability was assessed over 16 weeks, and no significant change was observed in the measured acoustic and optical properties.

中文翻译:

固化温度和时间对PVCP声学和光学性能的影响。

聚氯乙烯增塑溶胶(PVCP)已越来越多地用作光声和超声成像的幻像材料。作为工业应用中最有用的聚合物材料之一,其机械性能和性能是众所周知的。尽管以前已经研究了几种配方的声学和光学特性,但仍不清楚如何通过改变制造方法来影响这些特性。在这里,提出了一种改进而直接的制造方法,并研究了固化温度和固化时间对PVCP声学和光学性能以及其随时间的稳定性的影响。在2到15 MHz的频率范围内确定了声音的速度和衰减,而样品的光学衰减光谱是在500至2200 nm的波长范围内测量的。结果表明,在160°C至180°C的固化温度下可获得最佳性能,而所需的固化时间随温度的升高而减少。所制造的模型的特性是高度可重复的,这意味着只要固化温度和时间在完全胶凝融合的范围内(样品是光学透明的)且低于热降解的极限,则该模型对制造条件不敏感。 (由样品的淡黄色表示)。评估了样品在16周内的长期稳定性,并且在测得的声学和光学性能方面未观察到明显变化。结果表明,在160°C至180°C的固化温度下可获得最佳性能,而所需的固化时间随温度的升高而减少。所制造的模型的特性是高度可重复的,这意味着只要固化温度和时间在完全胶凝融合的范围内(样品是光学透明的)且低于热降解的极限,则该模型对制造条件不敏感。 (由样品的淡黄色表示)。评估了样品在16周内的长期稳定性,并且在测得的声学和光学性能方面未观察到明显变化。结果表明,在160°C至180°C的固化温度下可获得最佳性能,而所需的固化时间随温度的升高而减少。所制造的模型的特性是高度可重复的,这意味着只要固化温度和时间在完全胶凝融合(样品是光学透明的)范围内且低于热降解极限的范围内,该模型对制造条件不敏感。 (由样品的淡黄色表示)。评估了样品在16周内的长期稳定性,并且在测得的声学和光学性能方面未观察到明显变化。所制造的模型的特性是高度可重复的,这意味着只要固化温度和时间在完全胶凝融合的范围内(样品是光学透明的)且低于热降解的极限,则该模型对制造条件不敏感。 (由样品的淡黄色表示)。评估了样品在16周内的长期稳定性,并且在测得的声学和光学性能方面未观察到明显变化。所制造的模型的特性是高度可重复的,这意味着只要固化温度和时间在完全胶凝融合的范围内(样品是光学透明的)且低于热降解的极限,则该模型对制造条件不敏感。 (由样品的淡黄色表示)。评估了样品在16周内的长期稳定性,并且在测得的声学和光学性能方面未观察到明显变化。
更新日期:2020-03-07
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