低熔点聚酰胺的制备与性能  

Preparation and characterization of low melting point polyamide

作　　者：毛雪峰[1] 钱杨[1] 蒋佳莉[1] 周邓飞 么丹阳 王秀华[1] 

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,浙江杭州310018

出　　处：《纺织学报》2016年第3期6-10,共5页Journal of Textile Research

基　　金：浙江省科技成果转化推广工程项目(2013T101)

摘　　要：为改善聚酰胺加工工艺,以十二碳二元酸、癸二胺、癸二酸、己二胺、己内酰胺为原料,通过直接熔融缩聚制得二元胺不同配比的低熔点聚酰胺。采用傅里叶变换红外光谱(FT-IR)、差示扫描量热(DSC)、热重分析(TG)等对制得的样品进行了表征。结果表明:低熔点聚酰胺的谱图呈现典型的聚酰胺特征峰;随着2种二元胺比例接近1∶1,聚合物熔点和结晶能力明显下降;随二元胺中癸二胺比例的增加,低熔点聚酰胺的热稳定性提高。沸水萃取实验结果表明,合成的低熔点聚酰胺中单体及低聚物质量分数均小于0.63%,无需萃取,可以直接进行后加工。Dodecanedioic acid,decamethylenediamine,decanedioic acid,hexamethylenediamine and caprolactam were selected to prepare serial polyamides with low melting point,which contained different proportions of diamines,by the direct melt polymerization. The resultant samples were characterized by Fourier transform infrared spectrometry（ FT-IR）, differential scanning calorimetry（ DSC） and thermogravimetric analysis（ TGA）. The typical characteristic peaks of polyamide almost appeared in all the FT-IR spectra. DSC indicated that the melting point and crystallinity of polymers decreased significantly when the ratio of decamethylenediamine and hexamethylenediamine was close to 1 ∶ 1.Thermogravimetric analysis（ TGA） revealed that the thermal stability of the samples was improved with the increase of decamethylenediamine content. The results of the boiling water extraction demonstrated that the contents of two amine monomers and the oligomers in the polyamides with lower melting point were less than 0. 63%,which can be directly used in the subsequent processing.

关 键 词：聚酰胺 直接熔融聚合 低熔点 热稳定性 

分 类 号：O633.22[理学—高分子化学] TS102.5[理学—化学]