scholarly journals Asymmetric Polymerization of 9-Phenylfluoren-9-yl Methacrylate Leading to a Polymer with Main-Chain Configurational Chirality. Synthesis of Optically Active Poly(methyl methacrylate)

1998 ◽  
Vol 30 (7) ◽  
pp. 596-600 ◽  
Author(s):  
Tamaki Nakano ◽  
Yasuaki Hidaka ◽  
Yoshio Okamoto
Keyword(s):  
Methyl Methacrylate ◽  
Main Chain ◽  
Optically Active ◽  
Poly Methyl Methacrylate ◽  
Asymmetric Polymerization

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.

Helix-Sense-Controlled Synthesis of Optically Active Poly(methyl methacrylate) Stereocomplexes

2008 ◽  
Vol 130 (36) ◽  
pp. 11889-11891 ◽  
Author(s):  
Takehiro Kawauchi ◽  
Atsushi Kitaura ◽  
Jiro Kumaki ◽  
Hiroshi Kusanagi ◽  
Eiji Yashima
Keyword(s):  
Methyl Methacrylate ◽  
Optically Active ◽  
Controlled Synthesis ◽  
Poly Methyl Methacrylate

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

Study of the effect of aggregation on the structure of syndiotactic poly(methyl methacrylate) by infrared spectra of its deuterated analogues

1984 ◽  
Vol 49 (10) ◽  
pp. 2259-2268 ◽  
Author(s):  
Jiří Dybal ◽  
Bohdan Schneider ◽  
Marian Mihailov
Keyword(s):  
Methyl Methacrylate ◽  
Infrared Spectra ◽  
Main Chain ◽  
Chain Conformation ◽  
Conformational Structure ◽  
Poly Methyl Methacrylate ◽  
Carbon Backbone ◽  
Temperature Trends ◽  
Extended Chain ◽  
Vibrational Bands

The temperature trends of the infrared spectra of the films of some specifically deuterated analogues of syndiotactic poly(methyl methacrylate) were measured and vibrational bands sensitive to the conformational structure of the carbon backbone and to the orientation of ester groups with respect to the main chain were determined. Analysis of the spectra has confirmed that aggregated syndiotactic poly(methyl methacrylate) contains a higher population of diads in the extended chain conformation in long syndiotactic sequences as compared to the nonaggregated polymer, and has shown that in the aggregate, ordering of ester groups also takes place.

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.

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