Influence of nanosilica and methyl methacrylate–butadiene–styrene core–shell rubber particles on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy resin

Abstract

The influence of nanosilica and methyl methacrylate–butadiene–styrene (MBS) core–shell rubber particles on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy resin (EP)/dicyandiamide were investigated using tensile test, dynamic mechanical thermal analysis, and differential scanning calorimetry under dynamic conditions. The results indicated that inclusion of core–shell rubber particles and nanosilica (NS) into EP increased cure onset, peak and end temperatures of the modified EP relative to the neat EP. Studies on cure kinetics based on Kissinger and Ozawa method also showed that there was decrease in the values of Ea and A. Also, the order of the overall reaction was found to be approximately equal to 2. Differential scanning calorimetry graphs obtained by the experimental data had good agreement with that calculated theoretically. Young’s modulus and tensile strength of the EP increase with the inclusion of NS; however, the corresponding values decrease when the core–shell particles are included in the EP. The tensile strength and the modulus of the EP modified with NS and core–shell particles also decreased relative to the neat EP. On the other hand, by adding core–shell particles and NS, the glass transition temperature of the samples remained approximately constant as obtained from dynamic mechanical thermal analysis.

Curing characteristics, swelling, and mechanical properties of natural rubber/nitrile butadiene rubber blends with and without compatibilizer

“…It has a good balance of transparency and impact resistance (Takahashi et al, 2015). Styrene and methyl methacrylate (MMA) are grafted onto styrene butadiene rubber (SBR) or poly(butadiene) (PB) particles so that MBS is a typical core-shell rubber modifier (Mousavi & Amraei, 2015;Ren et al, 2014). MBS is an impact modifier polymer that contains 0.01 to 5 percent (w/w) of the polymers of at least one compound of the formula, wherein R 1 and R 2 are C 1 to C 4 alkyl, R 3 and R 4 are HC 1 to C 4 alkyl, or 4-hydoxy 2'-R 2 5'-R 1 -phenyl.…”

Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

“…Afterwards, the samples were gently poured into mold and cured at 120°C for 90 min. The details of experimental setup were according to Mousavi and Amraei previous work ( Figure 2) [23]. Details of the composition of the formulations are listed in Table 2.…”

“…These tougheners decrease modulus, tensile strength, and glass transition temperature (T g ); so in order to enhance the mechanical and thermal properties, the toughened EPs are reinforced by nanosilica (NS) particles. Mousavi and Amraei [23] used EP-CSR-NS composites and found that NS partially offsets the reduction in properties caused by CSR.…”

Kemampuan Proses Dan Karakteristik Vulkanisasi Campuran NBR/Epdm

“…MBS mengandung polimer karet pada susunan elastomernya yaitu styrene-butadiene rubber (SBR) sehingga dapat meningkatkan sifat mekanik polimer (Ren et al, 2014;Liu et al, 2014;Zhou et al, 2012). MBS juga banyak digunakan sebagai kompatibiliser baik untuk plastik (Moolsin & Saksayamkul, 2016;Mousavi & Amraei, 2015;Liu et al, 2014). Montmorillonite (MMT) adalah salah satu mineral tanah liat alami yang memiliki luas permukaan yang besar.…”

“…Dari persamaan (1) Tabel 4 menunjukkan karakteristik dinamik dari kompon NBR/EPDM. Data karakteristik ini didapat dari pengujian dengan menggunakan rheometer, yang menunjukkan mH (torsi maksimum) dan mL (torsi minimum).…”