By understanding the effects of the physical properties of individual input materials (e.g., binding system) on the physical and thermal properties of a composite material, the latter can be engineered in advance according to the desired properties and application. Often, a need to replace a specific component in a composite material arises, due to various reasons such as high raw material prices, product price reduction, environmental issues, improvement of properties, and others. In this study, we focused on the substitution of a phenolic novolac resin binding system and the reduction of compounding process temperature in combination with material throughput and screw speed variation of a phenolic-novolac-resin-based composite material, manufactured by kneading process using a co-kneader single screw extruder. Modifications were carried out in the interest of reducing production process cost and positive environmental effect due to reduction of energy consumption in the compounding process. We achieved great success in improvement of mechanical properties with all four substituted phenolic molding compounds (PMCs), while the decrease in thermal stability was the lowest for PMCs prepared at higher screw speeds and material throughput. The results indicated that higher screw speeds produce the best combination of mechanical and thermal properties of PMCs.

中文翻译：

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通过捏合工艺改进和复合配方改善基于热固性粘结体系的复合材料的力学性能

通过了解各个输入材料（例如，粘合系统）的物理性能对复合材料的物理和热性能的影响，可以根据所需的性能和应用预先设计复合材料。由于各种原因，例如高昂的原材料价格，产品价格降低，环境问题，性能改善等，常常需要替换复合材料中的特定组分。在这项研究中，我们重点研究了酚醛线型酚醛树脂粘结体系的替代和降低复合工艺温度，以及通过使用一种橡胶的捏合工艺制造的酚醛-酚醛树脂基复合材料的材料通过量和螺杆速度变化。共捏合机单螺杆挤出机。为了降低生产过程的成本和由于减少混合过程中的能量消耗而产生的积极的环境影响，进行了修改。我们在所有四种取代的酚醛模塑料（PMC）的机械性能改善方面均取得了巨大成功，而热稳定性的下降对于以更高的螺杆速度和材料产量生产的PMC而言是最低的。结果表明，较高的螺杆转速可以使PMC的机械性能和热性能达到最佳组合。而在较高螺杆速度和物料通过量下制备的PMC的热稳定性下降最低。结果表明，较高的螺杆转速可以使PMC的机械性能和热性能达到最佳组合。而在较高螺杆速度和物料通过量下制备的PMC的热稳定性下降最低。结果表明，较高的螺杆转速可以使PMC的机械性能和热性能达到最佳组合。