Acrylonitrile-Methyl methacrylate copolymer was synthesized in aqueous solution by Redox. The copolymer was mixed with 10-40wt% of microencapsulated n-octadecane (MicroPCMs) in water. Copolymer films containing MicroPCMs were cast at room temperature. The copolymer of acrylonitrile-methyl methacrylate and the copolymer films containing MicroPCMs were characterized by using Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Thermogravimetric Analyzer (TG), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), etc. The microcapsules in the films are evenly distributed in the copolymer matrix. The heat-absorbing temperatures and heat-evolving temperatures of the films are almost the same as that of the MicroPCMs, respectively. The heat-absorbing temperatures increase slightly with the contents of MicroPCMs increasing. In addition, the enthalpy efficiency of MicroPCMs rises with the contents of MicroPCMs increasing. The crystallinity of the film increases with the contents of MicroPCMs increasing.

Microcapsules and nanocapsules containing n-octadecane with melamine-formaldehyde shell were fabricated by in situ polymerization. The effects of stirring rate, contents of emulsifier and contents of cyclohexane on diameters, morphology, phase change properties and thermal stabilities of the capsules were studied by using FT-IR, SEM, DSC and TG. The diameters of the microcapsules decreased with the increase of stirring rate, emulsifier content and cyclohexane content. The relationship between stirring rate and number-average diameters or weight-average diameters of the microcapsules is an exponent. The relationship between emulsifier content and number-average diameters or weight-average diameters of the microcapsules is an exponent, too. The diameters had less effects on the melting behaviour of microcapsules, however, they had significant effects on the crystallization behaviour. As the diameters of the microcapsules decreased, two crystallization peaks were observed from the DSC cooling curves. The ratio of the integrated area of the peak in the lower temperature increased with the decrease in diameters of microcapsules. The thermal stability of micro/nanocapsule rises with the increase of stirring rates and TA content. The cyclohexane content has no significantly effect on thermal stability of the nanocapsule.

Thermo-regulated polyacrylonitrile-vinylidene chloride (PAN/VDC) fibers containing 4-40wt.% of micro phase-change materials (microPCMs) were wet-spun. In this study, fibers containing less than 30wt.% of microencapsulated n-octadecane were spun smoothly. The structures and properties of the fibers were investigated by using Fourier transform infrared, scanning electron microscopy, differential scanning calorimetry, wide-angle X-ray diffraction, dynamic mechanical analysis and thermogravimetric analysis, etc. The microcapsules were intact and evenly distributed inside the polymer matrix. The tensile strengths of the fibers with titers in the range of 1.9 to 10.9 dtex were 0.7 to 2.0 cN/dtex. The elongation of the fibers was approximately 7%. The heat-absorbing and heat-evolving temperatures of the fibers increased slightly with the increase of the content of microPCMs. The enthalpy of melting or enthalpy of crystallization of the fiber containing 30 wt.% of microPCMs was approximately 30 J/g, and the enthalpy of melting or enthalpy of crystallization increased steadily as the content of microPCMs increased. The modulus of the fiber decreased with the increase in the amount of microPCMs in the fiber. The glass transition temperature of the fiber was 89-108

采用水相沉淀法制备了舍有 0~30mol 丙烯酸甲酯(MA)的丙烯腈(AN)-丙烯酸甲酯共聚物。采用红外光谱 (FT-IR)、差热分析(DSC)、x射线衍射(XRD)、核磁共振(NMR)等方法时聚合产物进行了分析。聚合产物的组成比与投料比相近，随MA比例的增加，分解温度升高，玻璃化转变温度(Tg )降低。舍MA30mol的共聚物的分解温度为338.8 LC，而熔融温度任为188.8℃，由于第二单体MA 的加入。使得共聚物的熔点降低至分解温度之前，这为改性聚丙烯腈的无增塑熔融纺丝提供了可能性。

The polyacrylonitrile-methyl acrylate (AN/MA mole ratio 100/0-70/30) copolymers and copolymers (AN/MA mole ratio 85/15) containing up to 40wt% of microencapsulated n-octadecane (MicroPCMs) are synthesized in water. The MicroPCMs were incorporated at the step of polymerization. The effect of the MA mole ratio and MicroPCMs content on structures and properties of the copolymers were studied by using Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (1H NMR), scanning electronic microscope (SEM), differential scanning calorimetry (DSC), thermogravimetry analysis (TG), gel permeation chromatography (GPC), and X-ray diffraction (XRD). The feeding ratio agreed well with the composition of the AN/MA copolymers. The copolymers are synthesized in the presence of MicroPCMs. The melting point moves to lower temperature (206℃), while the decomposition temperature moves to higher temperature (309℃) with increasing of the MA mole ratio and microcapsules content. The number–average molecular weight of the copolymer is ~30,000. The crystallinity of the copolymer decreases with increasing of the MA mole ratio and microcapsules content.