High-temperature-resistant and size-stable modified material for engine and preparation method thereof

The invention relates to the field of high polymer materials, and particularly discloses a high-temperature-resistant and size-stable modified material for an engine and a preparation method thereof. The high-temperature-resistant and size-stable modified material for the engine comprises the following components in parts by weight: 60-70 parts of polyamide 66, 30-33 parts of chopped glass fibers, 1-2 parts of a heat-resistant agent, 1-5 parts of an anti-warping agent, 0.3-0.5 part of an antioxidant, 0.5-1 part of a lubricant and 0.2-0.4 part of a nucleating agent. The preparation method comprises the following steps: S1, weighing; s2, mixing; and S3, extruding and granulating. The high-temperature-resistant and size-stable modified material for the engine has the advantages of high size stability, high thermal deformation temperature, small buckling deformation and good noise reduction effect. 本申请涉及高分子材料领域，具体公开了一种用于发动机的耐高温及尺寸稳定的改性材料及其制备方法。用于发动机的耐高温及尺寸稳定的改性材料包括以下重量份的组分：聚酰胺66 60-70份、短切玻璃纤维30-33份、耐热剂1-2份、防翘曲剂1-