scholarly journals Synthesis of Graft Polymer with Controlled Stereoregularities in the Main Chain and in the Side Chains by Stereospecific Copolymerization of Isotactic Poly(methyl methacrylate) Macromonomer with Methacrylate Monomer

1995 ◽  
Vol 27 (12) ◽  
pp. 1180-1193 ◽  
Author(s):  
Tatsuki Kitayama ◽  
Osamu Nakagawa ◽  
Koichi Hatada
Keyword(s):  
Methyl Methacrylate ◽  
Main Chain ◽  
Side Chains ◽  
Graft Polymer ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer

Synthesis of Polymer Brushes Composed of Poly(phenylacetylene) Main Chain and Either Polystyrene or Poly(methyl methacrylate) Side Chains

2007 ◽  
Vol 40 (2) ◽  
pp. 178-185 ◽  
Author(s):  
Wei Zhang ◽  
Masashi Shiotsuki ◽  
Toshio Masuda ◽  
Jiro Kumaki ◽  
Eiji Yashima
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Brushes ◽  
Main Chain ◽  
Side Chains ◽  
Poly Methyl Methacrylate

scholarly journals Reactive Comb Polymer Compatibilized Immiscible PVDF/PLLA Blends: Effects of the Main Chain Structure of Compatibilizer

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 526
Author(s):  
Xin Yang ◽  
Jinxing Song ◽  
Hengti Wang ◽  
Qingqing Lin ◽  
Xianhua Jin ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Glycidyl Methacrylate ◽  
Main Chain ◽  
Vinylidene Fluoride ◽  
Chain Structure ◽  
Side Chains ◽  
Poly Methyl Methacrylate ◽  
Continuous Structure ◽  
Comb Structure ◽  
Compatibilizing Effect

The compatibilizer with double comb structure has a superior compatibilizing effect for immiscible polymer blends due to the symmetrical structure on both sides of main chains. Extensive study related to the architectural effects of compatibilizer on the compatibilization has mainly focused on the side chains. We investigated the influence of the compatibilizer-main-chain structure on the compatibilizing effect for immiscible poly(vinylidene fluoride)/poly(L-lactic acid) (PVDF/PLLA) blends. Two reactive-comb compatibilizers with polystyrene (PS) and polymethylmethacrylate (PMMA) as main chains and PMMA as the side chains have been synthesized. PS is immiscible with both PLLA and PVDF, while PMMA is miscible with PVDF. It was found that both compatibilizers can improve the compatibility between the PLLA and PVDF, with different compatibilization effects. In the PVDF/PLLA (50/50) blends, 1 wt.% poly(styrene-co-glycidyl methacrylate)-graft-poly(methyl methacrylate) (RC–SG) tuned the morphology from the droplet-in-matrix structure to the co-continuous structure, while the blends with poly(methyl methacrylate-co-glycidyl methacrylate)-graft-poly(methyl methacrylate) (RC–MMG) kept the sea-island structure with even 3 wt.% loading. Moreover, RC–SG induces a wider co-continuous interval range than RC–MMG. The co-continuous structure obtained by RC–SG was also more stable than that by RC–MMG. It was further found that RC–SG-compatibilized PVDF/PLLA blends exhibit higher mechanical properties than the RC–MMG-compatibilized blends.

scholarly journals Effect of Ferocene Concentration on the Percent Conversion and Molecular Weight of Poly(Methyl Methacrylate) Homopolymers

2017 ◽  
Vol 14 (2) ◽  
pp. 311-319
Author(s):  
Baghdad Science Journal
Keyword(s):  
Molecular Weight ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Radical Polymerization ◽  
Free Oxygen ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Percent Conversion ◽  
Methyl Methacrylate Monomer

This research is addressing the effect of different ferrocene concentration (0.00, 2.15x10-3, 4.30x10-3, 8.60x10-3, and 12.9x10-3) on the bulk free radical polymerization of methyl methacrylate monomer in benzene using benzoyl peroxide as initiator. The polymerization was conducted at 60º C under free oxygen atmosphere. The resulting polymers were characterized by FTIR. The results were compared with the presence and absence of ferrocene at 10% conversion. The %conversion was 3.04% with no ferrocene present in the polymerization medium and its increase to 9.06 with a first lowest ferrocene concentration added, i.e. 2.15 x10-3mol/l. This was positively reflected on the poly(methyl methacrylate) molecular weight measured by viscosity technique, especially in the presence of ferrocene.

Nuclear magnetic resonance studies of ionomers. 5. Spectra of poly (methyl methacrylate-co-4-vinyl pyridine), poly (methyl methacrylate-co-2-methyl-5-vinyl pyridine), and their quaternized derivatives

1987 ◽  
Vol 65 (8) ◽  
pp. 1873-1881 ◽  
Author(s):  
Almeria Natansohn ◽  
Adi Eisenberg
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Methacrylate ◽  
Pyridine Ring ◽  
Main Chain ◽  
Structural Units ◽  
Poly Methyl Methacrylate ◽  
Nuclear Magnetic Resonance Spectra ◽  
Vinyl Pyridine ◽  
Nuclear Magnetic

Proton and carbon nuclear magnetic resonance spectra in solution of poly (methyl methacrylate-co-4-vinyl pyridine), poly(methyl methacrylate-co-2-methyl-5-vinyl pyridine), and of their derivatives obtained by quaternization with methyl iodide are presented. The vinyl pyridine structural units content of the samples is ca. 10%. In different solvents, the spectra provide information about the sequence distribution and configuration of the copolymers. A "coisotactic" alternating addition, defined as the probability of finding a methoxy group and a pyridine ring neighboring each other on the same side of the main chain, can be estimated as about 0.5 in both cases. This information arises from the splitting of the aromatic and of the methoxy signals (both in proton and carbon spectra). As expected, quaternization does not affect the copolymer configuration. Heteronuclear-correlated two-dimensional spectra can help in assigning the spectra.

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