Tannin-Ca Complex as Green Thermal Stabilizer Additive for PVC: Viscoelastic Properties
作者： Hussein A. Shnawa , Yousef Jahani , Moayad N. Khalaf , Abed Alamer H. Taobi
关键词: Thermal stability 、 Glass transition 、 Viscoelasticity 、 Composite material 、 Dynamic mechanical analysis 、 Thermal 、 Stabilizer (chemistry) 、 Thermal analysis 、 Materials science 、 Polymer
摘要: This study investigated the viscoelastic and rheometeric properties of PVC stabilized with tannin-Ca complex as totally bio-based thermal stabilizer. Dynamic mechanical analysis (DMTA) used to characterize samples obtained by mixing PVC with three composition percentages (1.0, 2.0, 3.0) part per hundred ratios (phr) tannin-Ca complex this polymer. The torque rheometery test used monitor effect tannins derivative on stability formulations during samples processing. For that purpose, sample 2 phr commercial stabilizer (Reapak B-NT/ 7060) was for comparison considered reference samples. Before glass transition temperature at 30°C - 60°C, DMTA curves show values storage modulus and tan delta tannin derivative were very similar those PVC sample transition temperature (Tg) of PVC occurred about 76°C. In a sequence, after region samples, scans confirmed that have relatively longer flowing stage which occurs at lower temperatures 18°C stabilizer. Global results suitable plateau stages show that processing flexibility are clearly increased the incorporation complex. All tannins-Ca excellent viscoelastic found be slightly best or much closed obtained for stabilization.
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