低熔点聚酰胺的结晶和熔融行为  

Crystallization and Melting Behaviors of Low Melting Point Polyamide

作　　者：林巧巧[1] 蒋佳莉[1] 徐双喜 陈跃平 王秀华[1] LIN Qiao-qiao JIANG Jia-li XU Shuang-xi CHEN Yue-ping WANG Xiu-hua(National Engineering Laboratory for Textile Fiber Materials ＆ Processing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China Shaoxing Global Chemical Fiber Corporation, Shaoxing 312000, Zhejiang, China)

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 [2]绍兴九洲化纤股份有限公司,浙江绍兴312000

出　　处：《合成纤维》2016年第12期1-5,共5页Synthetic Fiber in China

基　　金：浙江省科技成果转化推广工程项目(2013T101)

摘　　要：采用差示扫描量热法和X射线衍射法对低熔点聚酰胺的结晶和熔融行为进行研究,考察了共聚单体、等温结晶温度和时间对样品结晶和熔融行为的影响。结果表明:经等温结晶后的样品再次升温时,均出现了双熔融峰,且随等温结晶温度的升高或时间的延长,低温熔融峰向高温方向移动,而高温熔融峰则基本不变。等温结晶温度80℃时,两种样品的熔融焓值均较大,并且随结晶时间的延长会变大。X射线衍射结果表明:随着结晶温度的升高或时间的延长,衍射峰变得尖锐,样品的结晶度增大。添加了十二烷基二胺的切片B比添加癸二胺的切片A具有更好的结晶能力,比较适合纺丝加工。Effects of comonomer, isothermal crystallization temperature and time on the crystallization and melting be- haviors of low inching point polyamide were investigated via differential scanning calorimeter and X-ray diffraction （XRD）. Experimental results indicated that two melting peaks were appeared in the isothermal crystallization process- es. The lower melting peak was moved towards higher temperature with either increasing isothermal crystallization tem- perature or time, while the higher melting peek was kept relatively constant. A high mehing enthalpy value of sam- ples was showed up at 80 ~C and raised with the increase of isothernml crystallization time. XRD results showed that the diffraction peaks were sharper, and crystallinity was gradually raised with the extension of crystallization tempera- ture or time. Addition of dodecyl diamine made sample B had a better crystallization ability than that of decamethylene diamine in the sample A, and sample B was more suitable for spinning processes.

关 键 词：低熔点 聚酰胺 等温结晶 熔融峰 

分 类 号：TQ342.1[化学工程—化纤工业]