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PA12的学名为聚十二内酰胺,又称尼龙12。其聚合的基本原料是丁二烯,可依赖于石油化工。是半结晶-结晶热塑性材料。

简介
它的特性和PA11相似,但晶体结构不同。PA12是很好的电气绝缘体并且和其它聚酰胺一样不会因潮湿影响绝缘性能。
它有很好的抗冲击性机化学稳定性。PA12有许多在塑化特性和增强特性方面的改良品种。和PA6及PA66相比,这些材料有较低的熔点和密度,具有非常高的回潮率。
PA12对强氧化性酸无抵抗能力。
PA12的粘性主要取决于湿度、温度和储藏时间。
它的流动性很好。收缩率在0.5%到2%之间,这主要取决于材料品种、壁厚及其它工艺条件PA12 聚酰胺12或尼龙12典型应用范围:水量表和其他商业设备,电缆套,机械凸轮,滑动机构,光伏背板及轴承等。

聚酰胺树脂,英文名为Polyamide,简称PA。俗称尼龙(Nylon),它是大分子族链重复单元含有酰胺基团的高聚物的总称。为五大工程原料中产量最大,品种最多,用途最广的品种。
主要的品种有尼龙6,尼龙66,尼龙11,尼龙12,尼龙610,尼龙612,尼龙46,尼龙1010等,其中尼龙6,尼龙66产量最大,约占尼龙产量的90 %以上。
尼龙11和尼龙12具有低温韧性。尼龙46具有优异的耐热性而得到迅速发展,尼龙1010是以蓖麻油为原料的我国的特有品种。

典型应用范围
水量表和其他商业设备,电缆套,机械凸轮,滑动机构,光伏背板以及轴承等

化学和物理特性
PA12是从丁二烯线性,半结晶-结晶热塑性材料。它的特性和PA11相似,但晶体结构不同。
PA12是很好的电气绝缘体并且和其它聚酰胺一样不会因潮湿影响绝缘性能。它有很好的抗冲击性机化学稳定性。
PA12有许多在塑化特性和增强特性方面的改良品种。和PA6及PA66相比,这些材料有较低的熔点和密度,具有非常高的回潮率。
PA12对强氧化性酸无抵抗能力。
PA12的粘性主要取决于湿度、温度和储藏时间。它的流动性很好。收缩率在0.5%到2%之间,这主要取决于材料品种、壁厚及其它工艺条件。


Nylon 12 is a nylon polymer with the formula [(CH2)11C(O)NH]n. It is made from ω-aminolauric acid or laurolactam monomers that each have 12 carbons, hence the name ‘Nylon 12’. It is one of several nylon polymers.

Properties
Nylon 12 exhibits properties between short chain aliphatic nylons (e.g., nylon 6 and nylon 66) and polyolefins.[3] At 178-180 °C, the melting point of nylon 12 is the lowest among the important polyamides. Its mechanical properties, such as hardness, tensile strength, and resistance to abrasion, are similar to those of nylon 6 and nylon 66. Low water absorption and density, 1.01 g/mL, result from its relatively long hydrocarbon chain length, which also confers it dimensional stability and an almost paraffin-like structure. Nylon 12 is also chemical resistant and insensitive to stress cracking.

Applications
Nylon 12 has a broad range of applications as polyamide additives. Nylon 12 is mainly used for films for packing material in the food industry and sterilized films and bags for use in the pharmaceutical and medical fields. When added to polyethylene films, it improves water vapor permeability and aroma impermeability.

It is also prepared as sheets and sintered powder for coating metals. In the electronics field, it is used for covering cables and insulating material, while in the automobile industry it is used to prepare oil and gasoline resistant tubes. In the cosmetic and personal care industries, it is used as bulking and opacifying agents in the face and body powders, and skin creams.[4] Nylon 222 has also found uses in the textile industry and for producing sporting and leisure goods among other applications.