Schneider Mariane, Finimundi Noriê, Podzorova Maria, Pantyukhov Petr, Poletto Matheus
Chemical Engineering, Exact Sciences and Engineering, University of Caxias do Sul (UCS), Caxias do Sul 95070-560, Brazil.
Faculty of Trade Economics and Commodity Science, Plekhanov Russian University of Economics, 117997 Moscow, Russia.
Materials (Basel). 2021 Jan 23;14(3):543. doi: 10.3390/ma14030543.
Lignosulfonate is a cheap material available in large quantities obtained as a byproduct of paper and cellulose. In this work, blends of polypropylene (PP) and sodium lignosulfonate (LGNa) were developed to evaluate the potential use of lignosulfonate as a lightweight, thermal insulation and flame retardant material. The blends were obtained by mixing in a torque rheometer and molded after compression. The blend proprieties were evaluated by physical, morphological, thermal, thermal conductivity, and flammability tests. The measured values were compared with theoretical models. The results indicated that a heterogeneous blend with a higher number of separated domains is formed when the LGNa content increases from 10 to 40 wt%. In addition, the density and thermal conductivity coefficient of the blends studied are not affected by the addition of LGNa. However, when the LGNa content in the blend exceeds 20 wt% the thermal stability and flame retardant proprieties are considerably reduced. The theoretical models based on the rule of mixtures showed a good agreement with the experimental values obtained from blend density, thermal conductivity, and thermal stability. In general, lignosulfonate tested in this work shows potential to be used as a reactive component in polymer blends.
木质素磺酸盐是一种廉价的材料，大量可得，它是纸张和纤维素生产过程中的副产品。在这项工作中，开发了聚丙烯（PP）与木质素磺酸钠（LGNa）的共混物，以评估木质素磺酸盐作为轻质、隔热和阻燃材料的潜在用途。通过在转矩流变仪中混合并在压缩后成型来制备共混物。通过物理、形态、热、热导率和燃烧性测试来评估共混物的性能。将测量值与理论模型进行比较。结果表明，当LGNa含量从10 wt%增加到40 wt%时，会形成具有更多分离域的非均相共混物。此外，所研究的共混物的密度和热导率系数不受LGNa添加的影响。然而，当共混物中LGNa含量超过20 wt%时, 热稳定性和阻燃性能会显著降低。基于混合法则的理论模型与从共混物密度、热导率和热稳定性获得的实验值显示出良好的一致性。总体而言，这项工作中测试的木质素磺酸盐显示出在聚合物共混物中用作反应性组分的潜力。
