Stress transmission coefficient is a reliable and robust parameter for quantifying powder plasticity

Stress transmission coefficient is a reliable and robust parameter for quantifying powder plasticity
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应力传递系数是量化粉末塑性的可靠且稳健的参数

DOI:
10.1016/j.powtec.2021.117066
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发表时间:
2022
期刊:
影响因子:
5.2
通讯作者:
Sun, Changquan Calvin
Sun, Changquan Calvin
中科院分区:
工程技术2区
文献类型:
--
作者:
Vreeman, Gerrit;Sun, Changquan Calvin

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现有方法导出的粉末塑性参数对孔隙度测量中的误差很敏感,这些误差是由致密密度、真密度或两者的不准确测量引起的。使用一些具有超过两个数量级塑性的材料,粉末致密化后的应力传递系数(STC)与所有四个现有的模内和模外塑性参数密切相关。由于STC的测定只需要测量轴向和径向应力,因此不存在其他现有方法在测定片剂孔隙度时存在的误差。此外,STC不受用户错误的影响,因为数据可以由计算机使用带有仪器化模具的压实模拟器收集。综上所述,STC可替代传统的粉末塑性参数,在药物研发初期指导片剂配方设计。
Powder plasticity parameters derived by existing methods are sensitive to errors in porosity measurements resulting from inaccurate measurements of compact density, true density, or both. Using a number of materials exhibiting plasticity over a range of more than two orders of magnitude, the post-powder densification stress transmission coefficient (STC) strongly correlates with all four existing in-die and out-of-die plasticity parameters. Since the STC determination requires only axial and radial stress measurements, it is free from errors in the determination of tablet porosity suffered by other existing methods. Additionally, the STC is immune from user error, because data can be collected by a computer using a compaction simulator with an instrumented die. Overall, the STC is an excellent alternative to traditional powder plasticity parameters for guiding the tablet formulation design in early stages of drug development.
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发表时间: 2016-06-15
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