CURING BEHAVIOR, KINETICS AND MORPHOLOGY OF HOT CURED UNSATURATED POLYESTER/NANO-CLAY NANOCOMPOSITE RESIN WITH DUAL INITIATORS
Publish place: 2nd International Conference on Composites: Characterization, Fabrication and Application
Publish Year: 1389
نوع سند: مقاله کنفرانسی
زبان: English
View: 2,350
This Paper With 6 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
COMPOSIT02_036
تاریخ نمایه سازی: 24 مهر 1389
Abstract:
The curing behavior and cure kinetic parameters of an unsaturated polyester resin (UP) containing organically treated Na-Montmorillonite (Cloisite® 30B) was investigated by SPI test method and dynamic differential scanning calorimetry (DSC). The state of dispersion of the nanoclay was investigated by small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The exothermic peak temperature and gel time was measured by using SPI test method according to ISO 584 at 80°C. Dual initiators system composed of benzoyl peroxide (BPO) and tertiary butyl perbenzoate (TBPB) were used as initiators. TBPB peroxide works well at high temperature and it has higher half-life compared to BPO which decompose around 80°C. Analyzing the curing curves based on SPI test method showed the low exothermic heat, long gel time and low cure rate as expected for BPO/UP resin cured containing TBPB. The addition of 1, 3 and 5% (w/w) of nanoclay resulted in decrease the gel time, exothermic peak and increase the cure rate compared to those obtained from the pure unsaturated polyester resin. Dynamic DSC with heating rate of 10°C/min was used to study the curing behavior of UP/ Cloisite®30B and pure UP system. The curing kinetic parameters were determined by using Borchardt-Daniels method. It was observed that curing reaction starting temperature and activation energy decreased in the system including UP/ Cloisite®30B compared to the pure resin. Results showed in UP/ Cloisite®30B systems higher reaction rate and more conversion ratio besides shorter cycle has been achieved. SAXS was used to determine the degree of intercalation and/or exfoliation of clay platelets via determination of the inter-platelets spacing. SAXS analysis results proved that the nanocomposite including 1 and 3 wt% Cloisite®30B showed exfloliation morphology and in 5 wt% Cloisite®30B showed intercalation. The TEM micrographs of the nanocomposite including 3 wt% Cloisite®30B depicted the exfoliation morphology and were in agreement with the SAXS analysis information
Keywords:
Authors
N Naderi
M.Sc. student, South Tehran branch, Islamic Azad University, Faculty of graduate studies
M.H. Beheshty
Associate Professor, Iran Polymer and Petrochemical Institute
S Mazinani۳
Assistant Professor, Amirkabir Nanotechnology Research Institute (ANTRI),
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :