摘要
在4 000-600 cm^-1的频率范围内,采用一维红外光谱,二阶导数红外光谱和四阶导数红外光谱研究了聚酰胺-66的分子结构。以聚酰胺-66的ν（amide-Ⅲ）和ν（amide-Ⅳ）为对象,采用变温红外光谱技术进一步开展了聚酰胺-66热稳定性的研究。实验发现,在303-393 K的温度范围内,聚酰胺-66的ν（amide-Ⅲ）和ν（amide-Ⅳ）对应的红外吸收频率均出现了明显的红移现象。首先分别开展了聚酰胺-66的ν（amide-Ⅲ）和ν（amide-Ⅳ）的二维红外光谱研究。实验发现：聚酰胺-66的ν（amide-Ⅲ）的红外吸收频率包括：1 277 cm^-1（ν（amide-Ⅲ-1））和1 269 cm^-1（ν（amide-Ⅲ-2））,而随着测定温度的升高,聚酰胺-66的ν（amide-Ⅲ）的红外吸收峰变化快慢顺序为1 269 cm^-1（ν（amide-Ⅲ-2））〉1 277 cm^-1（ν（amide-Ⅲ-1））;聚酰胺-66的ν（amide-Ⅳ）的红外吸收频率包括：939 cm^-1（ν（amide-Ⅳ-1））和931 cm^-1（ν（amide-Ⅳ-2））,而随着测定温度的升高,聚酰胺-66的ν（amide-Ⅳ）红外吸收峰变化快慢顺序为931 cm^-1（ν（amide-Ⅳ-2））〉939 cm^-1（ν（amide-Ⅳ-1））。进一步同时开展了聚酰胺-66的ν（amide-Ⅲ）和ν（amide-Ⅳ）的二维红外光谱研究。随着测定温度的升高,聚酰胺-66的ν（amide-Ⅲ）和ν（amide-Ⅳ）的红外吸收峰变化快慢顺序为1 269 cm^-1（ν（amide-Ⅲ-2））〉1 277 cm^-1（ν（amide-Ⅲ-1））〉931 cm^-1（ν（amide-Ⅳ-2））〉939 cm^-1（ν（amide-Ⅳ-1））。本项研究拓展了三级红外光谱技术在高分子材料结构及热稳定性方面的研究范围。
The polyamide-66 organic molecular structure was characterized by the one-dimensional infrared spectroscopy, second derivative infrared spectroscopy and fourth derivative infrared spectroscopy（4 000-600 cm^-1）. The thermal stability of polyamide-66 ν（amide-Ⅲ） and ν（amide-Ⅳ） were studied by variable temperature infrared spectroscopy（30-393 K）. The red shift（ν（amide-Ⅲ） and ν（amide-Ⅳ）） was found obviously. The 2 D-IR spectroscopy of polyamide-66 of ν（amide-Ⅲ） and ν（amide-Ⅳ） were researched respectively. The band resulting from the ν（amide-Ⅲ） appeared near 1 277 cm^-1（ν（amide-Ⅲ-1）） and 1 269 cm^-1（ν（amide-Ⅲ-2））, and the sequence of infrared absorption peak changes was 1 269 cm^-1（ν（amide-Ⅲ-2））1 277 cm^-1（ν（amide-Ⅲ-1）） with the increase of temperature. The band resulting from the νamide-Ⅳ were 939 cm^-1（ν（amide-Ⅳ-1）） and 931 cm^-1（ν（amide-Ⅳ-2））, but the infrared absorption peak of intensity changes was 931 cm^-1（ν（amide-Ⅳ-2））939 cm^-1（ν（amide-Ⅳ-1））. The 2 D-IR spectroscopy of polyamide-66 of ν（amide-Ⅲ） and ν（amide-Ⅳ） were studied at the same time. The the sequence of infrared absorption peak changes was 1 269 cm^-1（ν（amide-Ⅲ-2））1 277 cm^-1（ν（amide-Ⅲ-1））931 cm^-1（ν（amide-Ⅳ-2））939 cm^-1（ν（amide-Ⅳ-1））. It expands the research scope of the three stage infrared spectroscopy technology in the structure and thermal stability of polymer materials.
作者
刘卫华
林玉柏
范有娟
史君坡
于宏伟
Liu Weihua;Lin Yubai;Fan Youjuan;Shi Junpo;Yu Hongwei(Chengde National Middle School,Chengde 067000,China;Shijiazhuang College School of Chemical Engineering,Shijiazhuang 050035,China;Shijiazhuang College Academic Affairs,Shijiazhuang 050035,China)
出处
《塑料科技》
CAS
北大核心
2018年第6期66-72,共7页
Plastics Science and Technology
基金
石家庄市科学技术研究与发展计划课题(171501232A)
