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首先以乙基纤维素(EC)为大分子引发剂引发ε-己内酯(CL)的开环聚合反应(ROP),合成乙基纤维素接枝聚ε-己内酯的梳形共聚物(EC-g-PCL).之后利用N,N’-二环己基碳二亚胺(DCC)做脱水剂将荧光基团芘(Pyr)引入侧链聚ε-己内酯(PCL)末端,经控制投料比,合成不同含量芘端基的乙基纤维素接枝聚ε-己内酯的荧光梳形共聚物(EC-g-PCL-Pyr).利用傅里叶变换红外(FTIR)、核磁共振(NMR)对其结构进行表征,运用差示扫描量热仪(DSC)和原子力显微镜(AFM)研究其热性能和结晶性能,通过紫外-可见光谱(UV-Vis)、荧光光谱对其光学性质进行研究.研究结果表明该荧光梳形共聚物的荧光强度与芘的接枝量有关.
Firstly, the ring-opening polymerization (ROP) of ε-caprolactone (CL) was initiated by using ethyl cellulose (EC) as the macroinitiator to synthesize the comb copolymer of ethylcellulose grafted poly (ε-caprolactone) (EC-g-PCL) .Phosphoropyrene (Pyr) was then introduced into the side chain poly (ε-caprolactone) (PCL) using dehydration agent N, N’-dicyclohexylcarbodiimide (DCC) The EC-g-PCL-Pyr of ethylcellulose-grafted poly (ε-caprolactone) with different pyrene end groups was synthesized by controlling the feed ratio.Using Fourier transform infrared spectroscopy (FTIR) Their structures were characterized by means of nuclear magnetic resonance (NMR). Their thermal properties and crystallinity were studied by differential scanning calorimetry (DSC) and atomic force microscopy (AFM). Their structures were characterized by UV - Vis and fluorescence spectroscopy Optical properties of the study.The results show that the fluorescent comb copolymer fluorescence intensity and the amount of pyrene grafted.