Preparation and characterisation of liquid epoxidised natural rubber in latex by chemical degradation was successfully carried out. The effect of certain parameters, such as surfactant concentrations, incubation time of ENR latex in the presence of surfactant and pH condition on the reaction efficiency were studied. Effect of degrading agent concentrations and drying temperatures of LENR were also investigated. The molecular weight, i.e., M_w and M_n, which was determined by gel permeation chromatography (GPC) and gel content of LENR were decreased gradually as the degrading agent concentrations increased. Moreover, the drying temperatures, ranging from 333 to 423 K showed no significant changes in epoxidation levels and epoxy derivatives, as the drying period decreased from 24 to 4 h. The resulting LENR were further characterised using Fourier transform infra-red (FTIR) spectroscope, nuclear magnetic resonance (NMR) spectroscope, differential scanning calorimeter (DSC) and field emission-scanning electron microscope (FE-SEM). The glass transition temperature, T_g of LENR, i.e., 252 K was increased compared with ENR, i.e., 248 K. Besides, the latex particles morphology of LENR were found to be more uniform and larger compared with ENR. The functional groups such as carbonyl as functional end group, hydroxyl, epoxy, ester and furan groups were increased after degradation of ENR to form LENR. This indicates that the presence of functional polar groups at the LENR backbone play an important role which brings about the distinguished characters and properties of LENR.

通过化学降解成功地进行了乳胶中液态环氧天然橡胶的制备和表征。研究了表面活性剂浓度，表面活性剂存在下ENR胶乳的保温时间和pH条件等参数对反应效率的影响。还研究了降解剂浓度和LENR干燥温度的影响。分子量，即M _w和M _n通过凝胶渗透色谱法（GPC）测定，随着降解剂浓度的增加，LENR的凝胶含量逐渐降低。此外，随着干燥时间从24 h减少到4 h，干燥温度从333到423 K不显示出环氧化水平和环氧衍生物的显着变化。使用傅立叶变换红外（FTIR）光谱仪，核磁共振（NMR）光谱仪，差示扫描量热仪（DSC）和场发射扫描电子显微镜（FE-SEM）对所得的LENR进行进一步表征。玻璃化温度，T _gLENR的胶乳颗粒形态比ENR的248K增加了252K。此外，发现LENR的胶乳颗粒形态与ENR相比更均匀且更大。在ENR降解形成LENR之后，诸如羰基作为官能端基，羟基，环氧基，酯基和呋喃基的官能团增加。这表明在LENR骨架上官能极性基团的存在起着重要的作用，这带来了LENR的显着特征和性质。