PVC-silica hybrids: effect of sol–gel conditions on the morphology of silica particles and thermal mechanical properties of the hybrids

The presence of low-molecular-weight by-products is a major problem in poly[2-hydroxethyl methacrylate (HEMA)-silica] hybrids prepared using sol-gel synthesis. Low-molecular-weight by-products have a detrimental effect on the optical transparency, and mechanical and storage properties of poly(HEMA-silica) hybrids. To solve this problem, a new sol-gel synthesis procedure was developed to prepare organic–inorganic hybrids. Glycidyl methacrylate (GMA) was used as a comonomer to form poly(HEMA-GMA-silica) (PHGS) hybrids. In addition to forming a copolymer, GMA has two more functions. It facilitates the removal of almost all of the low-molecular-weight by-product molecules formed during sol-gel synthesis and also prevents further condensation of free silanol groups during the polymerization, storage, and use. The mechanical properties of PHGS hybrids were evaluated by using compression testing. The mechanical properties of PHGS hybrids were higher compared to Plexiglas G poly(methyl methacrylate), and the hybrids can be synthesized with reproducible mechanical properties.

Download Full-text

A structural and physical study of sol–gel methacrylate–silica hybrids: intermolecular spacing dictates the mechanical properties

Physical Chemistry Chemical Physics ◽

10.1039/c5cp04656d ◽

2015 ◽

Vol 17 (43) ◽

pp. 29124-29133 ◽

Cited By ~ 14

Author(s):

Anthony L. B. Maçon ◽

Samuel J. Page ◽

Justin J. Chung ◽

Nadav Amdursky ◽

Molly M. Stevens ◽

...

Keyword(s):

Mechanical Properties ◽

Sol Gel ◽

Organic Moiety ◽

Physical Study ◽

Nanoscale Interactions ◽

Silica Hybrids ◽

Selection Of

Sol–gel hybrids are inorganic/organic co-networks with nanoscale interactions between the components leading to unique synergistic mechanical properties, which can be tailored, via a selection of the organic moiety.

Download Full-text

Acrylic-Based Polyurethane/Silica Hybrids Prepared by Acid-Catalyzed Sol-Gel Process: Structure and Mechanical Properties

Macromolecular Chemistry and Physics ◽

10.1002/macp.200400478 ◽

2005 ◽

Vol 206 (8) ◽

pp. 885-892 ◽

Cited By ~ 7

Author(s):

Guodong Chen ◽

Shuxue Zhou ◽

Guangxin Gu ◽

Limin Wu

Keyword(s):

Mechanical Properties ◽

Sol Gel ◽

Sol Gel Process ◽

Acid Catalyzed ◽

Silica Hybrids ◽

Process Structure

Download Full-text

Influence of sol–gel derived silica-based interfacial coatings on the mechanical properties of carbon–carbon composites

Carbon ◽

10.1016/s0008-6223(02)00387-1 ◽

2003 ◽

Author(s):

S Dhakate

Keyword(s):

Mechanical Properties ◽

Sol Gel ◽

Carbon Composites

Download Full-text

Mechanical Property Improvement of Poly(Butylene Succinate) by Reinforcing with Modified Fumed Silica

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1025-1026.215 ◽

2014 ◽

Vol 1025-1026 ◽

pp. 215-220 ◽

Cited By ~ 1

Author(s):

Sasirada Weerasunthorn ◽

Pranut Potiyaraj

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Impact Strength ◽

Flexural Strength ◽

Fumed Silica ◽

Tensile Modulus ◽

Silica Particles ◽

Melt Mixing ◽

Butylene Succinate ◽

Ir Spectrophotometry

Fumed silica particles (SiO2) were directly added into poly (butylene succinate) (PBS) by melt mixing process. The effects of amount of fumed silica particles on mechanical properties of PBS/fumed silica composites, those are tensile strength, tensile modulus, impact strength as well as flexural strength, were investigated. It was found that the mechanical properties decreased with increasing fumed silica loading (0-3 wt%). In order to increase polymer-filler interaction, fumed silica was treated with 3-glycidyloxypropyl trimethoxysilane (GPMS), and its structure was analyzed by FT-IR spectrophotometry. The PBS/modified was found to possess better tensile strength, tensile modulus, impact strength and flexural strength that those of PBS/fumed silica composites.

Download Full-text