Identification of formation stages in a polymeric foam customised by sonication via electrical resistivity measurements
Identification of formation stages in a polymeric foam customised by sonication via electrical resistivity measurements
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DOI：
10.1007/s10965-008-9249-4
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发表时间：
2009-09-01
影响因子：
2.8
通讯作者：
Corney, J.
中科院分区：
文献类型：
--
作者：
Torres-Sanchez, C.;Corney, J.
与泡沫塑料形成相关的聚合反应有不同的阶段(即成核、生长、堆积、硬化、固化)，其中一些已知对外部输入比其他阶段更敏感。因此，精确检测每个聚合阶段的起点和终点将能够精确控制材料特性，如固体泡沫中的孔隙率。只有在制造过程中能够清楚地区分这些敏感阶段，才能发展这种过程控制。本文报道了如何使用电阻率跟踪方法来评估超声辐射到发泡过程中的聚合物熔体时的发泡过程的差异，目的是为了定制最终固体基质的结构。还评价了电阻率跟踪法在准确识别泡沫中的地层阶段方面的适用性。
The polymerisation reactions associated with foam formation have distinct stages (i.e. nucleation, growth, packing, stiffening, solidification) some of which are known to be more sensitive to external inputs than others. Consequently, precise detection of the start and end points of each of the polymerisation stages would enable the fine control of material properties such as porosity in solid foams. The development of such process control can only be pursued if those sensitive stages can be clearly distinguished during the manufacture process. This paper reports how an electrical resistivity tracking method was used to assess the differences in the foaming processes when ultrasound was irradiated to polymeric melts undergoing foaming with the aim of tailoring the architecture of the final solid matrix. The electrical resistivity tracking method is also appraised with regard to its suitability to accurately identify the formation stages in the foam.