Effect of Different Ca/Zn Composite Thermal Stabilizers on Properties of PVC
The influence of two kinds of homemade Ca/Zn composite thermal stabilizers with high efficiency on the thermal stabilities and processing rheological properties of poly (vinyl chloride)(PVC) was evaluated by means of congo red test,thermal aging oven test,rheological test. The results show that the thermal stabilities and rheological properties of PVC with calcium/zinc 2,2-bis(hydroxymethyl) propionate composite thermal stabilizer is better than the products sold in the market,there is no noticeable discoloration for 80 min at 180℃,the congo red test paper do not discolor until 69.5 minutes later,the various parameters of the rheological properties are good. The properties of the other homemade stabilizer using Ca/Zn stearate is comparable with the foreign product.
NETL
NSTL
万方数据
维普
