Peroxide dynamically vulcanized high molecular weight hydrogenatedstyrenics block copolymer (SEBS)/polypropylene based TPV by one-stepand second-step processes via reactive extrusion

  • سال انتشار: 1403
  • محل انتشار: شانزدهمین سمینار بین المللی علوم و تکنولوژی پلیمر (ISPST ۲۰۲۴)
  • کد COI اختصاصی: ISPST16_625
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 84
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نویسندگان

Mehri Dana

Department of Polymer & Materials Chemistry, Faculty of Chemistry and Petroleum Science, Shahid BeheshtiUniversity, GC, ۱۹۸۳۹۶۹۴۱۱Tehran, Iran.۲Department of Materials Engineering, Pouya Gostar Khorasan Co. of Part Lastic Group, Mashhad, Iran.

Saeid Asadi Shahidi

Department of Materials Engineering, Pouya Gostar Khorasan Co. of Part Lastic Group, Mashhad, Iran.

Hasan Salahi

Department of Materials Engineering, Pouya Gostar Khorasan Co. of Part Lastic Group, Mashhad, Iran.

Mohammad Reza Nabid

Department of Polymer & Materials Chemistry, Faculty of Chemistry and Petroleum Science, Shahid BeheshtiUniversity, GC, ۱۹۸۳۹۶۹۴۱۱Tehran, Iran.

Soheil Yazdanbakhsh

Department of Materials Engineering, Pouya Gostar Khorasan Co. of Part Lastic Group, Mashhad, Iran.

Gholam Hossein Zohuri

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.

چکیده

Styrenics thermoplastic vulcanizates (STPV) were developed for long-term high temperatureapplications. These STPVs consist of polypropylene as the continuous phase and a crosslinkedhydrogenated styrenic block copolymer (SEBS) as the dispersed phase. The present study comparedthe single-step process and two-step process in an industrial scale twin-screw extruder. The resultsindicate that the tensile strength, hardness and density of the dynamically cross-linked blend for bothof the two methods have not changed significantly. Heat aging study was (۸۵ °C for ۱۶۸ h) o n theSEBS/PP blend was prepared via both of the single-step and two-step processes. It was found thatthe results were improved by two-step process. The compression set increase (about ۷%) in differentconditions (۱۲۰ °C for ۷۰ h, ۱۰۰ °C for ۲۲ h) on the SEBS/PP blend in the two-step process. Thetwo-step process led to increasing tensile stress at ۲۰% extension (from ۲.۷ to ۳.۳ MPa). Both ofelongation at break and melt flow index (۱۹۰ °C, ۵ kg, ۱۰ min) decreased ((from ۸۹۷% to ۳۰۹% andfrom ۶.۸ to ۳.۷ respectively).

کلیدواژه ها

styrenics thermoplastic vulcanizates, polypropylene, single-step, two-step, properties

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