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Investigation of the thermoformability of various D‐Lactide content poly(lactic acid) films by ball burst test
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-04-01 , DOI: 10.1002/pen.25378 Kornél Pölöskei 1 , Gergely Csézi 1 , Sándor Hajba 1 , Tamás Tábi 1, 2
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-04-01 , DOI: 10.1002/pen.25378 Kornél Pölöskei 1 , Gergely Csézi 1 , Sándor Hajba 1 , Tamás Tábi 1, 2
Affiliation
In this article, we investigated the thermoformability of poly(lactic acid) (PLA) films with various D‐Lactide contents and therefore different crystallization properties, performing tensile and ball burst tests at various temperatures and testing rates. We found that the behavior of the PLA films tested above the glass transition temperature significantly differs due to the difference in D‐Lactide content, and thus crystallinity. During tensile testing, elevated temperatures and mechanical stress caused the crystallization temperature to decrease and thus highly induced crystallization. At the same time, as testing speed was increased, the ability of the polymer to crystallize decreased. In ball burst tests, the PLA films crystallized more than during tensile testing. We described the differences found between tensile testing and ball burst testing, which latter better represents the conditions of thermoforming through inducing biaxial deformation.
中文翻译:
通过球爆试验研究各种D-丙交酯含量的聚乳酸薄膜的热成型性
在本文中,我们研究了具有不同D-丙交酯含量并因此具有不同结晶特性的聚乳酸(PLA)薄膜的热成型性,并在各种温度和测试速率下进行了拉伸和球爆试验。我们发现,在玻璃化转变温度以上测试的PLA薄膜的行为由于D的差异而显着不同。丙交酯含量,以及结晶度。在拉伸试验期间,升高的温度和机械应力导致结晶温度降低,并因此高度诱发了结晶。同时,随着测试速度的提高,聚合物结晶的能力下降。在球爆试验中,与拉伸试验相比,PLA膜的结晶更多。我们描述了拉伸测试和球爆测试之间的差异,后者更好地表示了通过诱导双轴变形进行热成型的条件。
更新日期:2020-04-01
中文翻译:
通过球爆试验研究各种D-丙交酯含量的聚乳酸薄膜的热成型性
在本文中,我们研究了具有不同D-丙交酯含量并因此具有不同结晶特性的聚乳酸(PLA)薄膜的热成型性,并在各种温度和测试速率下进行了拉伸和球爆试验。我们发现,在玻璃化转变温度以上测试的PLA薄膜的行为由于D的差异而显着不同。丙交酯含量,以及结晶度。在拉伸试验期间,升高的温度和机械应力导致结晶温度降低,并因此高度诱发了结晶。同时,随着测试速度的提高,聚合物结晶的能力下降。在球爆试验中,与拉伸试验相比,PLA膜的结晶更多。我们描述了拉伸测试和球爆测试之间的差异,后者更好地表示了通过诱导双轴变形进行热成型的条件。