scholarly journals Effect of Methyl Methacrylate/Polyhedral Oligomeric Silsesquioxane Random Copolymers in Compatibilization of Polystyrene and Poly(methyl methacrylate) Blends

2002 ◽  
Vol 35 (21) ◽  
pp. 8029-8038 ◽  
Author(s):  
Wenhua Zhang ◽  
Bruce X. Fu ◽  
Y. Seo ◽  
Eric Schrag ◽  
B. Hsiao ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Random Copolymers ◽  
Poly Methyl Methacrylate ◽  
Oligomeric Silsesquioxane

Thermal and Mechanical Properties of Poly(methyl methacrylate) Nanocomposites Containing Polyhedral Oligomeric Silsesquioxane

2012 ◽  
Vol 557-559 ◽  
pp. 304-308 ◽  
Author(s):  
Chun Bao Zhao ◽  
Xin Wang ◽  
Xu Jie Yang ◽  
Wei Zhao
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Bulk Polymerization ◽  
Thermal And Mechanical Properties ◽  
X Ray Diffraction ◽  
Poly Methyl Methacrylate ◽  
Pmma Matrix ◽  
Transmission Electron ◽  
Oligomeric Silsesquioxane

A series of poly(methyl methacrylate) (PMMA) composites containing polyhedral oligomeric silsesquioxane (POSS) were produced by bulk polymerization. The morphology, thermal and mechanical properties of the composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analyses (TGA) and dynamic mechanical analyses (DMA). Results show that the octa(3-chloropropyl)-POSS (ocp-POSS) and trisilanolphenyl-POSS (triol-POSS) have high compatibility with PMMA and can be uniformly dispersed into PMMA matrix. The separate incorporation of these two types of POSS contributes to the improvement of thermal stability of PMMA composites. When the content of POSS was 7.5 wt%, the thermal decomposition temperatures (5% mass loss) of PMMA composites with ocp-POSS and triol-POSS were increased by about 104 °C and 130 °C, respectively. The increase of triol-POSS content in the PMMA matrix gave slight enhanced storage modulus before glass transition.

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