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Property improvement of plasticized poly(vinyl chloride) by nano‐TiO 2 and poly(methyl methacrylate)–encapsulated nano‐TiO 2
Author(s) -
Chuayjuljit Saowaroj,
Neeranatmanit Konlasad,
Boonmahitthisud Anyaporn
Publication year - 2016
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21462
Subject(s) - materials science , nanocomposite , ultimate tensile strength , vinyl chloride , composite material , thermal stability , methyl methacrylate , poly(methyl methacrylate) , polymerization , polymer , chemical engineering , copolymer , engineering
To improve the physical properties of plasticized poly(vinyl chloride) (p‐PVC), the p‐PVC nanocomposites filled with four loading levels (3, 5, 7, and 9 parts per hundred of PVC resin) of either nanosized titanium dioxide (nTiO 2 ) or poly(methyl methacrylate)–encapsulated nTiO 2 (PMMA‐nTiO 2 ) were prepared by melt mixing on a two‐roll mill, followed by compression molding. The PMMA‐nTiO 2 used in this study was synthesized via in situ differential microemulsion polymerization. The resulting PMMA‐nTiO 2 exhibited core‐shell morphology (nTiO 2 core and PMMA shell) with an average diameter of 42.6 nm. The effects of nTiO 2 and PMMA‐nTiO 2 on the tensile properties, hardness, morphology, and thermal stability of the as‐prepared p‐PVC nanocomposites were then investigated and compared. The inclusion of either nTiO 2 or PMMA‐nTiO 2 nanoparticles increased the tensile strength, Young's modulus, hardness, and thermal stability of the nanocomposites in a dose‐dependent manner and reduced the elongation at break. However, the elongation at break was still higher than that for the neat p‐PVC. Moreover, the PMMA‐nTiO 2 nanocomposites had a higher enhancement of the tensile strength, Young's modulus, hardness, and thermal stability than the nTiO 2 nanocomposites at a similar loading level. Hence, the PMMA grafted on the nTiO 2 surface played an important role in toughening and increasing the thermal stability of the nanocomposites owing to the improved miscibility and interfacial adhesion between the encapsulated nanofiller and PVC matrix. J. VINYL ADDIT. TECHNOL., 22:433–440, 2016. © 2015 Society of Plastics Engineers