Effect of cyanoguanidine‐metal and urea‐metal complexes on the thermal degradation of poly(vinyl chloride)

Abstract

Synthesis of Cyanoguanidine-Metal ComplexesCyanoguanidine Complexes of SnCl 2 , Ni(NO 3 ) 2 , Co(NO 3 ) 2 , ZnCl 2 , and Cu(NO 3 ) 2 , were prepared according to the following method [7]:A solution of 1 mol of metal salt in ethanol was added to 2 mol of cyanoguanidine in ethanol, and the mixture was heated under reflux until precipitation of the complex occurred. The precipitate was then washed with hot etha-

Improvement of Thermal Properties of Poly(vinyl chloride) Using Chemical Blending Assisted Ultrasonic Technique

“…3). This is attributed to the increase in the crystalline regions provided by modified cellulose acetate polymeric matrix [18].…”

“…However, the PVC compounding is known to contain no more than 20 % additives to keep the plasticity of the film unaffected [17,18]. In a trial to give the blend film extra thermal stability, the PVC is mixed with traces of N-phenyl maleimide prior to blend it with cellulose acetate.…”

“…To overcome the accumulation of these heavy metals, organic based stabilizers were used as additives [6,7] or modifying agents [8,9]. Moreover, polymer blend technique is also considered as effective and commercial method to stabilize such a polymer [10][11][12][13], these stabilizers are environmentally accepted [14,15]. The aim of this work is to stabilize poly(vinyl chloride) by blending it with suitable biodegradable polymers through their amorphous regions to improve its thermal stability to enable the adjustment of poly(vinyl chloride) for plastics applications [16,17].…”

“…Preparation of modified cellulose acetate: Cellulose acetate modified by diallylamine was prepared by adding diallylamine to a solution of cellulose acetate in cyclohexanone according to the method described by Abdel-Naby et al [18]. The modification reaction occurs in ultrasonic bath of power 1050 W for 2 h at 60 °C.…”

Preparation of MgAl LDHs Intercalated with Amines and Effect on Thermal Behavior for Poly(vinyl chloride)

“…They can strengthen the capacity of absorbing Cl − ; the steric hindrance between the particles was enhanced, which prevented overlapping between the particles. Abir, S. and his coworkers studied cyanoguanidine-metal and urea-metal complex on the thermal stability for PVC and found out that urea had a thermal stability effect for PVC; urea/organotin mercaptide complex exhibited better stability than mercaptan tin [14]. Hong Zhu developed MgAl- 2 3 CO − -Cu LDHs with urea as a donor of 2 3 CO − and studied its thermal stability and smoke suppression; they found out that MgAl- 2 3 CO − -Cu LDHs had an excellent thermal stability for PVC.…”