Improving the flame retardancy properties of PLA/PC blends

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES
Yoldas Seki , Merve Saglam , Sibel Aker , Akın Isbilir , Mehmet Sarikanat , Lutfiye Altay
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Abstract

Polylactic acid/Polycarbonate (PLA/PC) blend was prepared via twin screw extruder by taking the bio-based content as much as possible and the better mechanical, thermal, and impact properties into consideration. Flame retardant (FR) performance of the PLA/PC blend was improved by using the mixture of ammonium polyphosphate, triphenyl phosphate, and zinc borate. FR properties of PLA/PC blend was evaluated according to the UL 94 test standard. The variations in tensile and flexural strength, and Izod-notched impact strength values were determined. In order to reduce the total amount of flame retardant additive, instead of using a mixture of TPP and APP (weight ratio of 2/1) at 21 wt% weight fraction, 1 wt% Zinc borate together with 18 wt% TPP-APP mixture was used and obtained V0 rating for the thickness of 1.5 mm. It was reported that weight fraction of flame retardant additives (APP and TPP) was successfully reduced by using a mixture of APP, TPP and ZnB without degrading the mechanical properties such as tensile and flexural strengths. Using less total FR additive weight (19 wt%) led to 15 and 24% higher tensile and flexural strength values, respectively, compared to higher FR additive weight (21 wt%).

Abstract Image

改善聚乳酸/聚碳酸酯混合物的阻燃性能
通过双螺杆挤压机制备了聚乳酸/聚碳酸酯(PLA/PC)共混物,在制备过程中考虑了尽可能多的生物基含量以及更好的机械、热和冲击性能。通过使用聚磷酸铵、磷酸三苯酯和硼酸锌的混合物,聚乳酸/聚碳酸酯共混物的阻燃(FR)性能得到了改善。根据 UL 94 测试标准对聚乳酸/聚碳酸酯混合物的阻燃性能进行了评估。测定了拉伸和弯曲强度的变化以及 Izod 缺口冲击强度值。为了减少阻燃添加剂的总量,研究人员没有使用重量分数为 21 wt%的 TPP 和 APP 混合物(重量比为 2/1),而是使用了 1 wt% 的硼酸锌和 18 wt% 的 TPP-APP 混合物,并在厚度为 1.5 mm 时获得了 V0 等级。据报道,通过使用 APP、TPP 和硼酸锌混合物,成功降低了阻燃添加剂(APP 和 TPP)的重量分数,而不会降低拉伸和弯曲强度等机械性能。与较高的阻燃添加剂重量(21 wt%)相比,使用较少的阻燃添加剂总重量(19 wt%)可使拉伸和弯曲强度值分别提高 15% 和 24%。
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来源期刊
Advanced Industrial and Engineering Polymer Research
Advanced Industrial and Engineering Polymer Research Materials Science-Polymers and Plastics
CiteScore
26.30
自引率
0.00%
发文量
38
审稿时长
29 days
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