THE SENSITIZING EFFECT OF ACRYLATES ON RADIATION VULCANIZATION OF NATURAL-RUBBER LATEX

The sensitizing effect of acrylates on radiation vulcanization of natu ral rubber latex was studied. The results indicate that Gc value of cr osslinking (Gc) will be higher at the same radiation dose when a sensi tizer exists, and Gc value decreases with the increase of radiation do se (D) conforming to the formula Gc=KD(-alpha), where K and alpha are constants depending on sensitizers. The more sensitizers added, the gr eater the Gc value. However, the viscosity of the natural rubber latex also increases rapidly along with the increase of sensitizers added. Some sensitizers, such as TMPTA, can decrease the optimum dose from ab out 200 kGy to approximately 20 kGy according to our experiment. The t ensile strength of the film can reach round 20 MPa. Other physical pro perties are comparable to those of unsensitized.