Poly (Methyl Methacrylate)-SiC Nanocomposites Prepared Through in Situ Polymerization

Tommasini, Flávio James; Ferreira, Leonardo da Cunha; Tienne, Lucas Galhardo Pimenta; Aguiar, Vínícius de Oliveira; Silva, Marcelo Henrique Prado da; Rocha, Luiz Felipe da Mota; Marques, Maria de Fátima Vieira

doi:10.1590/1980-5373-MR-2018-0086

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Articles • Mat. Res. 21 (6) • 2018 • https://doi.org/10.1590/1980-5373-MR-2018-0086 linkcopy

Poly (Methyl Methacrylate)-SiC Nanocomposites Prepared Through in Situ Polymerization

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

In this study, polymeric nanocomposites based on poly(methyl methacrylate) (PMMA) and silicon carbide (SiC) nanoparticles were prepared by radical mass polymerization in the presence of filler. Nanoparticles of SiC with and without surface treatment with organosilane were obtained .The nanocomposites were characterized by X-ray fluorescence (XRF), infrared spectroscopy (FTIR), thermogravimetry (TGA) and Field Emission Gun Scanning Electron Microscopy (FEG SEM) with an energy dispersive x-ray spectroscopy (EDS) detector. The produced nanocomposites showed well-dispersed SiC incorporation in the PMMA matrix. The results pointed that the surface treatment on SiC fillers was successful on enhancing the interaction between the organic matrix and the inorganic filler.

Keywords:
poly(methyl methacrylate); SiC nanoparticles; nanocomposites; in situ polymerization

PMMA	0 % Silicon (m/m)
U-PMMA/SiC Nanocomposites (%)	% Silicon (m/m)	T-PMMA/SiC Nanocomposites (%)	% Silicon (m/m)
U-PMMA/SiC 0.1	30	T-PMMA/SiC 0.1	24
U-PMMA/SiC 0.25	75	T-PMMA/SiC 0.25	40
U-PMMA/SiC0.5	67	T-PMMA/SiC 0.5	22
U-PMMA/SiC 1	81	T-PMMA/SiC 1	66

PMMA/SiC (%)	T_1onset (ºC)	T_{1 max} (ºC)	T_2onset (ºC)	T_2max (ºC)	T_3onset (ºC)	T_3max (ºC)	T_end (ºC)	Residue (%)
Neat PMMA	145	161	261	277	336	358	404	0.3
U-PMMA/SiC 0.1	125	158	248	268	341	362	407	1
U-PMMA/SiC 0.25	145	164	256	270	335	355	404	2
U-PMMA/SiC 0.5	140	157	257	276	335	353	412	5
U-PMMA/SiC 1	135	158	257	274	341	362	406	2
T-PMMA/SiC 0.1	112	130-163	263	276	345	365	421	35.15
T-PMMA/SiC 0.25	123	132-165	257	274	343	364	410	1
T-PMMA/SiC 0.5	152	160	263	277	345	368	423	3
T-PMMA/SiC 1	152	161	257	279	339	362	413	7

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[TFN1] ^T1
- degradation temperature of the first stage

[TFN2] ^T2
- degradation temperature of the second stage

[TFN3] ^T3
- degradation temperature of the third stage