Effect of the degree of crosslinking on the interfacial layer structure of poly(vinyl chloride) dispersed with crosslinked poly(n-butyl methacrylate) particles

Autor: Ryota Tsutsumi, Syuji Fujii, Mariko Sasaki, Takuya Matsumoto, Kazuki Takakura, Yoshinobu Nakamura, Kazuko Fujiwara, Shigeki Hikasa, Masayo Noda, Miyazaki Kenichi
Rok vydání: 2016
Předmět:
Zdroj: Composite Interfaces. 24:761-778
ISSN: 1568-5543
0927-6440
DOI: 10.1080/09276440.2016.1270644
Popis: The interfacial layer structure of a model incompatible polymer blend system was analyzed using 1H pulse nuclear magnetic resonance (pulse NMR) spectroscopy. Non-crosslinked and crosslinked poly(n-butyl methacrylate) particles with a mean size of ca. 0.9 μm were prepared by seeded emulsion polymerization, and the degree of crosslinking was varied. The particles were powdered using a freeze-dry method and dispersed in poly(vinyl chloride) by melt blending. Dynamic mechanical analysis indicated that the non-crosslinked particles were completely compatible. In contrast, mutual diffusion of the polymer chains in the crosslinked particles was restricted within the particle/matrix interfacial layer. As a result, an incompatible phase structure in which the crosslinked particles were dispersed in the continuous phase was formed. Pulse NMR analysis indicated that the interfacial layer thickness was in the range of 17–98 nm. The thickness decreased with an increase in the degree of crosslinking in the part...
Databáze: OpenAIRE