A solid-state 13C NMR study on phase heterogeneity in the miscible blend of amorphous poly(benzyl methacrylate) with semicrystalline poly(ethylene oxide)

Rong Hsien Lin, E. M. Woo, Jin C. Chiang

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

The rotating-frame spin-lattice relaxation time for protons, T(1H), was measured indirectly from 13C CP/MAS/DD NMR to probe possible molecular scales of heterogeneity in the miscible poly(benzyl methacrylate) (PBzMA)/poly(ethylene oxide) (PEO) blend over the whole composition range. According to the NMR results, only one phase was observed for the blends in which the PEO component is less than 16% (w/w). This miscible amorphous phase with PBzMA and PEO chains was mixed at the molecular level. Three phases were detected for the blends with PEO component > 16%, containing one miscible homogenous PBzMA-rich phase, one constrained PEO phase and one crystalline PEO phase. The PEO component asymptotically increases in the miscible homogenous PBzMA-rich phase as the PEO composition increases. NMR analysis helped resolve the complex phase domains in the PBzMA/PEO blend that is composed of an amorphous mixture of PBzMA/PEO and crystalline PEO spherulite regions. The intra- and inter-lamellar domains in the PEO spherulites are influenced and complicated by the surrounding amorphous PBzMA/PEO mixture with varying composition.

原文English
頁(從 - 到)4289-4297
頁數9
期刊polymer
42
發行號9
DOIs
出版狀態Published - 2001

All Science Journal Classification (ASJC) codes

  • 有機化學
  • 聚合物和塑料
  • 材料化學

指紋

深入研究「A solid-state <sup>13</sup>C NMR study on phase heterogeneity in the miscible blend of amorphous poly(benzyl methacrylate) with semicrystalline poly(ethylene oxide)」主題。共同形成了獨特的指紋。

引用此