Effect of thermal treatments on the laser sinterability of cryogenically milled polybutene-1
Effect of thermal treatments on the laser sinterability of cryogenically milled polybutene-1
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DOI：
10.1016/j.matdes.2018.04.072
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发表时间：
2018-09
影响因子：
8.4
通讯作者：
M. V. D. Eynde;D. Strobbe;O. Verkinderen;L. Verbelen;B. Goderis;J. Kruth;P. Puyvelde
中科院分区：
文献类型：
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作者：
M. V. D. Eynde;D. Strobbe;O. Verkinderen;L. Verbelen;B. Goderis;J. Kruth;P. Puyvelde
This paper demonstrates how thermal treatments can be used to enable the laser sintering (LS) of polybutene-1 (PB-1). One of the major issues with the examined PB-1 grade is the limited thermal operating window. At temperatures slightly below 90 °C crystallisation is too fast, resulting in warpage during processing. Above 90 °C, however, the powder becomes increasingly sticky, limiting the maximum bed temperature that can be applied in a laser sintering station. In this work, the problem is remediated by annealing the powder at 115 °C, which creates a more perfect crystal structure with a sharper melting onset. An alternative treatment of melting, slowly cooling and aging the sample at room temperature creates a powder with a stabilised crystal structure, which has a sharp melting onset at 120 °C and thus also a broader thermal window. Test parts were created on an LS machine validating the increase in processability.
