Abstract:

Epoxidized neopentylglycol dioleate （ENDO） was prepared as a novel eco?friendly plasticizer through an esterification reaction and an epoxidation reaction between oleic acid and neopentylglycol， and its chemical structure was characterized through Fourier?transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The rheological properties， low temperature embrittlement properties， solvent extraction resistance， and aging resistance of the polyvinyl chloride （PVC） compounds plasticized with ENDO， dioctyl phthalate （DOP）， dioctyl adipate （DOA） or trioctyl trimellitate （TOTM） were investigated using a torque rheometer， ultra?low temperature embrittlement tester， aging tester and universal testing machine. The results indicated that ENDO was successfully synthesized with a desired chemical structure. The TOTM?plasticized PVC compound exhibited greater torque and energy consumption than the ENDO， DOP， and DOA?plasticized one. The low?temperature embrittlement property of the plasticized PVC by ENDO could pass?30 ℃ test. In the extraction resistance test of n?hexane，the residual rates of elongation at break of the plasticized PVC by DOP，ENDO，DOA and TOTM were 88.24 %，87.99 %，1.69 % and 0.71 %，respectively. And in the extraction resistance test of anhydrous ethanol，they were 79.00 %，96.22 %，72.76 % and 74.52 %，respectively. The change rate of elongation at break and tensile strength，the mass loss of thermal aging of the plasticized PVC by ENDO were all lower than those of the plasticized PVC by TOTM.

Key words: epoxidized neopentylglycol dioleate, poly（vinyl chloride）, rheology, solvent extraction resistance, aging resistance