کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1613077 1516311 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of nano-scaled styrene butadiene rubber based nucleating agent on the thermal, crystallization and physical properties of isotactic polypropylene
ترجمه فارسی عنوان
تأثیر عامل نانوذرات بر پایه نانو ذرات نانو ذرات بوتادین بر روی گرما، کریستالیزاسیون و خواص فیزیکی پلی پروپیلن ایزوتاکتیک
کلمات کلیدی
پلیمرها، الاستومرها و پلاستیک ها، رشد کریستال، ساختار کریستالی، ویژگی های مکانیکی، پراش اشعه ایکس
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• The effect of a SBR based β-NA on the properties iPP was investigated.
• The addition of β-NA led to higher population of nuclei and smaller spherulites.
• β to α phase transformation was observed when re-extrusion process was applied.
• Impact strength was increased when the β-NA was added from 0.10 to 0.20 wt%.

The influence of a specific nano-scaled styrene butadiene rubber based β-nucleating agent (β-NA) on the properties of isotactic polypropylene (iPP) was investigated in the current research. β-NA was applied at the concentration ranged from 0.05 to 0.50 wt%. Microscopic observation revealed that the neat iPP crystals grew very slowly; they ranged in size from 100 to 200 μm. The addition of β-NA led to higher population of nuclei and smaller spherulites than those found in neat iPP. The addition of only 0.05 wt% β-NA significantly decreased the sizes of the spherulites down to 5 μm; the crystal grew very rapidly, leading to extremely fine morphology. Analysis by X-ray diffraction (XRD) confirmed that iPP/β-NA constituted mainly of β-crystal structure. The transformation of β to α phase was observed upon re-extrusion, it was verified by the lowered fraction of the β-crystalline phase (Kβ) although the total degree of crystallinity remained unchanged. A significant improvement in the impact strength of the iPP/β-NA was observed when the β-NA was employed from 0.10 to 0.20 wt%, leading to the formation of tough β-crystals in the β-NA nucleated iPP. The color measurement implied that the iPP nucleated with β-NA was superior in terms of whiteness but it was less transparent, as was evident by the increased haze.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 582, 5 January 2014, Pages 190–195
نویسندگان
, , ,