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一、概述: 聚乙烯是结晶型高聚物,用聚乙烯作原料发泡比较困难。现用先进的电子加速器作为辐射源,用电子辐照交联法生产聚乙烯泡沫塑料,具有操作方便,可在常温下生产,发泡孔径易于控制等特点。选择不同剂量可以得到不同孔径的发泡聚乙烯。由于扫描电镜有很大的景深,用它来检查和测定发泡的孔径是非常合适的。二、试样制备: 发泡聚乙烯的气孔是多层封闭式气孔,在真空下气孔会收缩变形,必须破坏它的封闭性气孔,用锋利的刀片切割试样呈薄片,用导电胶粘于试样架上,喷一层金作导电层,金层可适当厚些。
First, an overview: Polyethylene is a crystalline polymer, polyethylene as a raw material for more difficult to foam. Is the use of advanced electron accelerator as a radiation source, the use of electronic radiation cross-linked polyethylene foam production, with easy operation, can be produced at room temperature, easy to control the foam aperture characteristics. Choose different dosage can get different aperture foaming polyethylene. Due to the large depth of field of the scanning electron microscope, it is very suitable to inspect and measure the foamed pore size. Second, the sample preparation: stomatal polythene is a multi-layer closed stomata, the stomata will shrink under vacuum deformation, it must destroy the closed stomata, with a sharp blade cutting specimen was thin, conductive adhesive Sample rack, spray a layer of gold for the conductive layer, the gold layer may be appropriate thicker.