کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7786783 1500622 2016 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extensional flow behavior of aqueous guar gum derivative solutions by capillary breakup elongational rheometry (CaBER)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Extensional flow behavior of aqueous guar gum derivative solutions by capillary breakup elongational rheometry (CaBER)
چکیده انگلیسی
The extensional rheological properties of aqueous ionic carboxymethyl hydroxypropyl guar gum (CMHPG) and non-ionic hydroxypropyl guar gum (HPG) solutions between the semi-dilute solution state and the concentrated network solution state were investigated by capillary breakup elongational rheometry (CaBER). Carboxymethylated guar gum derivatives show an instable filament formation in deionized water. The ratio of elongational relaxation time λE over the shear relaxation time λS follows a power law of λE/λS ∼ (c · [η])−2. The difference of the relaxation times in shear and elongation can be related to the loss of entanglements and superstructures in elongational flows at higher strains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 136, 20 January 2016, Pages 834-840
نویسندگان
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