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首页> 外文期刊>Journal of Applied Polymer Science >Intrinsic flame retardancy of poly(lactic acid) bead foams
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Intrinsic flame retardancy of poly(lactic acid) bead foams

机译：聚（乳酸）珠泡沫的固有阻燃性

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摘要

Linear economy models are no longer acceptable for the plastic industry and a change to a sustainable circular plastic economy must take place. In the field of thermoplastic foams, the biopolymer poly(lactic acid) (PLA) is a suitable alternative for fossil based foams like polystyrene. However, the production of PLA bead foams is still a challenge. In regards to circular plastic economy products, a reduction of the needed polymer additives is aspired to simplify the union of end-of-life plastic streams. Flame retardants (FR) are required in many applications and are often the largest proportion of additives. It turns out that the removal of FRs, for example the removal of the REACh registered FR hexabromocyclododecane for polystyrene foams, requires a great effort. This paper shows that PLA bead foams require no FR to achieve a class E classification for construction products. Therefore, nine PLA types are analyzed by differential scanning calorimetry, thermogravimetric analysis, gel permeation chromatography, and rheotens measurements. From five types, PLA bead foams could be produced with two different densities. In addition, PLA bead foams containing 1.5 wt% alkoxy amine FR were produced. The flammability of the PLA bead foams was investigated by LOI, DIN-4102-1-B2, and cone calorimeter tests.
机译：线性经济模型不再适用于塑料行业，必须向可持续的循环塑料经济转变。在热塑性泡沫领域，生物聚合物聚乳酸（PLA）是聚苯乙烯等化石基泡沫的合适替代品。然而，聚乳酸珠状泡沫的生产仍然是一个挑战。对于循环塑料经济产品，希望减少所需的聚合物添加剂，以简化报废塑料流的结合。阻燃剂（FR）在许多应用中都是必需的，通常是添加剂中比例最大的。事实证明，去除FRs，例如去除REACh注册的用于聚苯乙烯泡沫的FR六溴环十二烷，需要很大的努力。本文表明，PLA珠状泡沫无需阻燃剂即可实现建筑产品的E级分类。因此，通过差示扫描量热法、热重分析、凝胶渗透色谱法和流变学测量对九种PLA类型进行了分析。从五种类型中，可以生产两种不同密度的聚乳酸珠状泡沫。此外，还制备了含有1.5 wt%烷氧基胺FR的PLA珠状泡沫。PLA珠状泡沫的可燃性通过LOI、DIN-4102-1-B2和锥形量热计测试进行了研究。

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