CAJ | 학술논문

在293～393 K范围内，分别测定聚乙烯的一维红外光谱、二阶导数红外光谱、四阶导数红外光谱和去卷积红外光谱来确定聚乙烯分子结构。进一步采用二维红外光谱研究了聚乙烯亚甲基面内摇摆振动模式（ CH 2r）。研究发现，聚乙烯分子中同时存在晶区和非晶区。随着测定温度的升高，聚乙烯分子中CH2r红外吸收强度变化快慢顺序为：720 cm－1（2(CH)rcrystaline）＞731 cm－1（2(CH)rcrystaline）＞725 cm－1（2(CH)ramorphous）。此项研究显示出二维红外光谱在高分子材料热变性分析中的重大作用。
재293～393 K범위내，분별측정취을희적일유홍외광보、이계도수홍외광보、사계도수홍외광보화거권적홍외광보래학정취을희분자결구。진일보채용이유홍외광보연구료취을희아갑기면내요파진동모식（ CH 2r）。연구발현，취을희분자중동시존재정구화비정구。수착측정온도적승고，취을희분자중CH2r홍외흡수강도변화쾌만순서위：720 cm－1（2(CH)rcrystaline）＞731 cm－1（2(CH)rcrystaline）＞725 cm－1（2(CH)ramorphous）。차항연구현시출이유홍외광보재고분자재료열변성분석중적중대작용。
In the temperature range from 293K to 393K, the polyethylene molecular structure has been studied by one-dimensional infrared spectroscopy, second derivative infrared spectroscopy, fourth derivative infrared spectroscopy and deconvolution infrared spectroscopy. The polyethylene CH2 rocking vibration(CH2r)was researched by two-dimensional infrared spectroscopy. The ordered crystalline region and disordered amorphous region were also found. Two-dimensional infrared spectroscopy of polyethylene were studied to determine the sequence of intensity changes. It has been found that the sequence of intensity changes was 720 cm-1(2(CH)rcrystaline)>731 cm-1(2(CH)rcrystaline)>725 cm-1(2(CH)ramorphous). The study demonstrated the key roles of two-dimensional infrared spectroscopy in the analysis of thermal denaturation of the polymer materials.