Pomalux® CN-SS Acetal (POM) Plastics Company 不锈钢纤维
Pomalux® CN-SS
Acetal (POM) Copolymer
Westlake Plastics Company
不锈钢纤维
产品说明:
Pomalux CN-SS (Conductive Acetal Copolymer) Stainless-steel-fiber-filled, non-sloughing, dimensionally stable material HDT @ 264 psi of 225° F. This material has relatively high chemical resistance, is extremely strong and stiff, and is an excellent choice for situations where carbon-based conductive fillers are not acceptable. Easily machined with carbide-tipped tooling to tight tolerances.
Advantages:
Low outgassing
Consistent resistivity values
Ease of machining
Good chemical resistance
Applications:
Disk drive assembly fixtures
Semiconductor/electronic components
Telecommunication hardware
Automotive equipment
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均聚甲醛的合成一般以甲醛的水溶液在酸的存在下缩合聚合。得到聚合度为100以上的a-聚甲醛,然后将其加热分解成甲醛气体,经精制和脱水后,通常利用部分预聚合的方法纯化单体,然后通入含少量引发剂的干燥溶剂中进行聚合。因为水的存在,使分子量显著降低。引发剂可用路易斯酸或碱等。但大多用叔胺进行负离子加成聚合,反应如下:聚甲醛的端基为半缩醛(—CH2OH),当温度高于 100℃ 时,端基易断裂,一般需经端基处理使之稳定化。稳定化处理后可耐热到230 ℃。多聚甲醛可在 170~200 ℃的温度下加工,如注射、挤出、吹塑等。主要用作工程塑料,用于汽车、机械部件等。