non-toxic PVC heat stabilizer Research

This article describes the mechanism of thermal decomposition of PVC heat stabilizers and mechanism of action . Comprehensive analysis of the types of PVC heat stabilizers and technical status quo ! Pointed out that no heavy metals hydrotalcite ! Rare earth compound heat stabilizer and will become the dominant species .
Polyethylene, polyvinyl chloride PVC is second only to the world 's second-largest synthetic resin azodicarbonamide  production over 90,000 , however , PVC there are some difficult to overcome the shortcomings of poor thermal stability which was most prominent. PVC due to poor thermal stability , softening temperature and decomposition temperature difference is small , has caused great difficulties to the process , so the machining process must be a certain amount of heat stabilizer in order to improve its thermal stability. Currently , the largest amount of lead salt heat stabilizer. In building a harmonious society and to ensure sustainable development in mind , people's awareness of environmental protection and health gradually chromium oxide  strengthened, therefore , low toxicity , no pollution, has become a complex and efficient PVC heat stabilizers direction of development.
Analysis of the thermal stability of PVC resin
PVC is one of the earliest synthetic thermoplastics , with difficult to burn , good mechanical properties , low prices , abundant source of raw materials , synthetic process maturity and other characteristics, widely used in construction , telecommunications , transportation, electronics, chemicals , packaging and other industries. pvc or subjected to high energy in the heat radiation, such as ultraviolet light "effect occurs under the autocatalytic reaction hcl off , the thermal decomposition mechanism generally believed that there are three kinds . oxygen environment of the free liquid stabilizer  radical mechanism ; ( 2 ) under a nitrogen atmosphere ionic mechanism ; ( 3 ) of the single vacuum molecular mechanisms that affect the thermal decomposition pvc chain structure is the main factor , means branched , double, allyl chloride , head structure , and molecular weight conjugated double bonds "in influence ; addition , oxygen , HCL additives and other external factors also have an impact .