
【化】 acetal(dehyde) resin
assemble; gather
【建】 poly-
armour; first; nail; shell
【醫】 carapace; concha; conchae; helo-; nail; onycho-; onyx
【醫】 aldehyde resin
Polyoxymethylene (POM), commonly known as 聚甲醛樹脂 (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 .
聚甲醛樹脂(Polyformaldehyde Resin,簡稱POM)是一種綜合性能優異的熱塑性結晶高分子聚合物,廣泛應用于工程塑料領域。以下是其詳細解析:
聚甲醛樹脂由甲醛分子通過聚合反應形成,分子鍊呈線性結構,無側鍊,具有高密度和高結晶性。根據聚合方式不同,可分為均聚甲醛(均聚物)和共聚甲醛(共聚物)兩類。
聚甲醛樹脂因優異的綜合性能,被廣泛用于:
其熱穩定性較差,長期使用溫度需控制在100℃以下,且需避免強酸、強堿環境。
聚甲醛樹脂是工程塑料中的重要材料,尤其適用于高精度、高耐磨場景,但需根據具體需求選擇均聚或共聚類型。更多細節可參考(搜狗百科)等來源。
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