PVC heat stabilizers - glycerin zinc experiment

 PVC heat stabilizers many different types, the article describes the principles and conclusions, mainly to introduce this experimental process.
 The main raw material
PVC, CPM-31, industrial grade, Chenzhou, Hunan Hydro plant; vinegar dioctyl phthalate (DOP), industrial grade, Changsha plastic eight plants; zinc stearate, AR, 99%, city of Hubei Province  PVC heat stabilizer Plastics Additives Plant; calcium stearate, AR, 99%, city of Hubei Province plastic additives plant: Glycerin zinc, homemade; triphenyl phosphite vinegar, industrial, Danyang City, Chang and chemical additives Ltd.;
Epoxy soybean oil, industrial grade, Danyang City, Chang and chemical additives Limited.
Major equipment and instruments
Torque rheometer, XSS a 300, Shanghai Branch Chong Rubber Machinery Co., Ltd.;
Aging test box, 40lB, Shanghai Experimental Instrument Factory;
Electronic universal testing machine, 1) W a 4005, Changchun Institute of Science the new company test equipment;
UV light box, 500W, Beijing Institute of electric light.
Sample Preparation
Formulations shown in Table 1 for quantity, after mixing plus O ~ 100mmx clean glass plate to a thickness of about 0.5 square cladding, plasticized at 160 ℃ 6min, made with Acrylic impact modifier  different stabilizers PVC film, and then were cut into 10mmx20mm samples for performance testing. Performance Testing and Characterization
Determination with Congo red Thermal stability test: GB2917-82 by a predetermined amount of dry mixture to release the tube, and the tubes were not certain depth in an oil bath at an oil bath temperature of 180 ℃ when the measured time of Congo red paper color ; compare the thermal drying heat drying discoloration observed: PVC film on each of the claimed dry aging test chamber set at 180 ℃ heat aging test carried out, test pieces taken every 10min, chromaticity variation test piece was observed, experiment has been extended to appear dark black so far. On the thermal aging specimens quantify the number, color code: 0 a transparent or white, one a pale yellow, 2 a pale yellow, 3 a yellow, four a yellowish brown, 5 a brown, 6 a reddish brown, 7 a deep brown, brown 8-9, a dark brown, 10 to black; dynamic thermal stability test: the torque rheometer mixing chamber temperature reaches 180 ℃, rotor black iron oxide  speed of 45 :/ min when, respectively, according to Table 1 609 Samples were added rheometer dynamic thermal stability test, significantly increased the slope of the torque curve corresponds to the time when the mind is the thermal decomposition time; specimens UV weathering performance test: PvC film release in accelerated aging and UV light box with light stability tests. 40h after sampling by
79 tested GHI040 a tensile strength and breaking elongation, the loading speed of 5 ~ / min, the initial tensile strength and elongation at break compared calculate tensile strength retention ratio and the fracture elongation retention.