کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5205555 1502933 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The rheological and crystallization behavior of polyoxymethylene
ترجمه فارسی عنوان
رفتار رئولوژیک و کریستالیزاسیون پلیوسی اتیلن
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

In the polymer melt processing, the solidification has a huge importance on the properties of the resulting part. For a semi-crystalline resin, this phenomenon involves a complex interplay between crystallization and the material rheology. In this work, an investigation is carried out on the influence of thermal conditions on crystallization kinetics and rheology of two commercial polyoxymethylene (POM) copolymers. In particular, isothermal crystallization experiments using differential scanning calorimetry (DSC) and rotational rheometry to measure the dynamic viscosity are performed. The evolution of the relative crystallinity and Normalized Rheological Function (NRF) are correlated by a recent technique which allows simultaneous analysis of several measurements, even if they are not carried out at same temperatures. On this basis, a relationship between the crystallinity and the hardening, i.e. the sharp increase in the viscosity, is obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 57, February 2017, Pages 203-208
نویسندگان
, , , ,