In Situ AFM Observation of Folded‐Chain Crystallization of a Low‐Molecular‐Weight Isotactic Poly(methyl methacrylate) in a Langmuir Monolayer at the Molecular Level

2021 ◽  
pp. 2000372
Author(s):  
Yuki Ono ◽  
Jiro Kumaki
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Molecular Level ◽  
Langmuir Monolayer ◽  
Low Molecular Weight ◽  
Poly Methyl Methacrylate ◽  
Afm Observation

Variation of periodic crazing based on polymer blends of an ultra-high and a low molecular weight poly(methyl methacrylate)

2016 ◽  
Vol 134 (1) ◽  
Author(s):  
Keishi Naito ◽  
Akiyoshi Takeno ◽  
Ryota Morifuji ◽  
Toshiaki Miyata ◽  
Minoru Miwa ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Polymer Blends ◽  
Low Molecular Weight ◽  
Poly Methyl Methacrylate

A Potential New RAFT - Click Reaction or a Cautionary Note on the Use of Diazomethane to Methylate RAFT-synthesized Polymers

2011 ◽  
Vol 64 (4) ◽  
pp. 433 ◽  
Author(s):  
Ming Chen ◽  
Graeme Moad ◽  
Ezio Rizzardo
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Click Reaction ◽  
Raft Polymerization ◽  
Dipolar Cycloaddition ◽  
Low Molecular Weight ◽  
Similar Reaction ◽  
Poly Methyl Methacrylate ◽  
End Groups

It has been found that diazomethane undergoes a facile 1,3‐dipolar cycloaddition with both dithiobenzoate RAFT agents and the dithiobenzoate end‐groups of polymers formed by RAFT polymerization. Thus, 2‐cyanoprop‐2‐yl dithiobenzoate on treatment with diazomethane at room temperature provided a mixture of stereoisomeric 1,3‐dithiolanes in near quantitative (>95%) yield. A low‐molecular‐weight RAFT‐synthesized poly(methyl methacrylate) with dithiobenzoate end‐groups underwent similar reaction as indicated by immediate decolourization and a quantitative doubling of molecular weight. Higher‐molecular‐weight poly(methyl methacrylate)s were also rapidly decolourized by diazomethane and provided a product with a bimodal molecular weight distribution. Under similar conditions, the trithiocarbonate group does not react with diazomethane.

Interdiffusion of Low Molecular Weight Deuterated Polystyrene and Poly(methyl methacrylate)

1996 ◽  
Vol 29 (22) ◽  
pp. 7269-7275 ◽  
Author(s):  
T. E. Shearmur ◽  
A. S. Clough ◽  
D. W. Drew ◽  
M. G. D. van der Grinten ◽  
R. A. L. Jones
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Low Molecular Weight ◽  
Poly Methyl Methacrylate
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