
【化】 acetal(dehyde) resin
assemble; gather
【建】 poly-
armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
【医】 aldehyde resin
Polyoxymethylene (POM), commonly known as 聚甲醛树脂 (jù jiǎ quán shù zhī) in Chinese, is a high-performance engineering thermoplastic characterized by its linear molecular structure formed through the polymerization of formaldehyde monomers. This semi-crystalline material exhibits exceptional mechanical strength, dimensional stability, and chemical resistance, making it a preferred choice in precision engineering applications .
The polymer's repeating unit (-CH₂-O-)ₙ creates a robust backbone structure that delivers:
Industrial applications span automotive components (fuel systems, gears), electrical connectors, and medical devices, where its FDA-compliant grades meet stringent safety requirements . Processing typically involves injection molding at 190-230°C, requiring strict moisture control during manufacturing to prevent molecular degradation.
Material specifications are governed by international standards including ISO 9981 and ASTM D4181, with various commercial grades (e.g., Delrin® by DuPont, Celcon® by Celanese) offering tailored properties for specific engineering challenges .
聚甲醛树脂(Polyformaldehyde Resin,简称POM)是一种综合性能优异的热塑性结晶高分子聚合物,广泛应用于工程塑料领域。以下是其详细解析:
聚甲醛树脂由甲醛分子通过聚合反应形成,分子链呈线性结构,无侧链,具有高密度和高结晶性。根据聚合方式不同,可分为均聚甲醛(均聚物)和共聚甲醛(共聚物)两类。
聚甲醛树脂因优异的综合性能,被广泛用于:
其热稳定性较差,长期使用温度需控制在100℃以下,且需避免强酸、强碱环境。
聚甲醛树脂是工程塑料中的重要材料,尤其适用于高精度、高耐磨场景,但需根据具体需求选择均聚或共聚类型。更多细节可参考(搜狗百科)等来源。
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