二聚酸型聚酰胺热熔胶的合成及性能研究

Study on synthesis and properties of dimer acid type polyamide hot-melt adhesive

以哌嗪和低纯度的二聚酸为原料合成二聚酸型聚酰胺HMA(热熔胶),考察了哌嗪和二聚酸掺量等对该HMA性能的影响。采用红外光谱(FT-IR)法、差示扫描量热(DSC)法对HMA的结构、玻璃化转变温度(Tg)和软化点等进行了表征,并分析了不同样品的拉伸强度和断裂伸长率等性能。研究结果表明:合成的产物是聚酰胺;随着哌嗪或二聚酸掺量的不断增加,HMA的Tg和软化点降低、拉伸强度下降,但断裂伸长率提高。

A dimer acid type polyamide HMA （hot-meh adhesive） was synthesized when the piperazine and dimer acid with low purity were used as raw materials, and the intluences of piperazine and dimer acid contents on the properties of HMA were investigated. The HMA＇ s structure, glass transition temperature （Tg） and softening point were characterized by infrared spectroscopy （FT-IR） , differential scanning calorimetry （DSC） methods, and the tensile strength and elongation at break of different samples were analysed. The research results showed that the synthesizing product was polyamide. The HMA＇s Tg, softening point and tensile strength were decreased but the elongation at break was increased with increasing piperazine or dimer acid contents.