Exploring the thermomechanical properties of peroxide/co‐agent assisted thermoplastic vulcanizates through temperature scanning stress relaxation measurements
نویسندگان
چکیده
Temperature scanning stress relaxation (TSSR) measurement of peroxide vulcanized polymer blends polypropylene (PP) and ultrahigh molecular-EPDM (UHM-EPDM) rubber has been performed to study the thermomechanical behavior thermoplastic vulcanizates (TPVs). Co-agents play crucial roles in enhancement properties TPVs. Different types co-agents (Triallyl cyanurate-TAC; N, N-m-phenylene-dimaleimide-HVA2; zinc dimethacrylate-ZDMA; in-situ formed dimethacrylate-ZMA) have explored this work. TSSR shows that higher T50 T90 values achieved ZMA co-agent assisted-TPV. Higher TSSR-index (RI) value was also found for same ZMA, indicating elastic behavior. result supports mechanical rheological properties, it is ZDMA show strength. Cross-linked-density calculated by modified Flory–Rehner equation cross-link-density as obtained from method compared trend be same. Stress slow relaxation-phenomena ZMA-TPV with slowest relaxation-time (θr) than other TPVs, which correlates superior material Thermogravimetric analysis proves there a difference degradation temperature at approximately 5–10°C. Ultrahigh molecular weight-EPDM/PP based TPVs reveal physico-mechanical over TAC HVA2. These weight-EPDM can used automotive seals/strips, hoses, bellows, 2 K-molds applications.
منابع مشابه
Characterization of Thermoplastic Elastomers by Means of Temperature Scanning Stress Relaxation Measurements
متن کامل
Influence of Engage® copolymer type on the properties of Engage®/silicone rubber-based thermoplastic dynamic vulcanizates
Thermoplastic vulcanizates (TPVs) are a special class of thermoplastic elastomers, which are produced by simultaneously mixing and crosslinking a rubber with a thermoplastic polymer at an elevated temperature. Peroxide-cured TPVs based on blends of silicone rubber and thermoplastic Engage of two different types, mainly ethylene-octene and ethylenebutene copolymers at different blend ratios have...
متن کاملEffect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
We previously reported that the dispersed rubber microparticles in ethylene-propylenediene monomer (EPDM)/polypropylene (PP) thermoplastic vulcanizates (TPVs) are actually agglomerates of rubber nanoparticles. In this study, based on this new understanding of the microstructure of TPV, we further revealed the microstructure-properties relationship of EPDM/PP TPV during dynamic vulcanization, es...
متن کاملcontrol of the optical properties of nanoparticles by laser fields
در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...
15 صفحه اولExploring the temperature-stress metabolome of Arabidopsis.
Metabolic profiling analyses were performed to determine metabolite temporal dynamics associated with the induction of acquired thermotolerance in response to heat shock and acquired freezing tolerance in response to cold shock. Low-M(r) polar metabolite analyses were performed using gas chromatography-mass spectrometry. Eighty-one identified metabolites and 416 unidentified mass spectral tags,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polymer Engineering and Science
سال: 2021
ISSN: ['1548-2634', '0096-8129', '0032-3888']
DOI: https://doi.org/10.1002/pen.25772