scholarly journals The emulsion polymerization induced self-assembly of a thermoresponsive polymer poly(N-vinylcaprolactam)

2019 ◽  
Vol 10 (6) ◽  
pp. 766-775 ◽  
Author(s):  
Joonas Siirilä ◽  
Satu Häkkinen ◽  
Heikki Tenhu
Keyword(s):  
Transition Temperature ◽  
Emulsion Polymerization ◽  
Self Assembly ◽  
Thermal Transition ◽  
Thermoresponsive Polymer

A thermoresponsive polymer, poly(N-vinylcaprolactam) (PNVCL), was synthesized in an emulsion above its thermal transition temperature to produce particles via polymerization induced self-assembly (PISA).

Preparation of Chitin Whisker and Effect to Crystallization of Polylactide

2018 ◽  
Vol 773 ◽  
pp. 82-87
Author(s):  
Nichaphat Passornraprasit ◽  
Wanpen Tachaboonyakiat
Keyword(s):  
Phase Separation ◽  
Transition Temperature ◽  
Nanocomposite Films ◽  
Degree Of Crystallinity ◽  
Thermal Transition ◽  
Hydrolysis Time ◽  
Film Extrusion ◽  
Agglomeration Of Nanoparticles ◽  
Acidolysis Reaction ◽  
The Degree Of Crystallinity

The aim of this study was to investigate the effect of chitin whisker (CW) to the crystallization of polylactide (PLA) nanocomposite films. CW which obtained from acidolysis reaction was compounded with PLA pellets into nanocomposite films by cast film extrusion. The morphology and crystallinity of CW were observed by TEM and XRD, illustrated that the dimension of whisker was affected by hydrolysis time. Increasing of hydrolysis time, the length of whisker was more regular with narrower distribution. Moreover, the crystallinity of whisker was obviously increased after acid hydrolysis. The nanocomposite film showed rough surface compared to pure PLA film due to some agglomeration of nanoparticles. However, CW and PLA were well-mixed with no phase separation. The introduction of 0.1 phr of CW decrease cold-crystallization temperature (Tcc) from about 121 °C to 118 °C and also increase the degree of crystallinity around 10%. There was no difference of thermal transition temperature between pure PLA and nanocomposite films with the addition of CW more than 0.1 phr which inspected by DSC. Despite the transition temperature express insignificantly different, the degree of crystallinity of nanocomposite was increase, indicating that chitin whisker would induce the crystallinity of PLA.

scholarly journals In Situ Encapsulation of Nile Red or Doxorubicin during RAFT‐Mediated Emulsion Polymerization via Polymerization‐Induced Self‐Assembly for Biomedical Applications

2020 ◽  
Vol 221 (5) ◽  
pp. 1900443 ◽  
Author(s):  
Joakim Engström ◽  
Heba Asem ◽  
Hjalmar Brismar ◽  
Yuning Zhang ◽  
Michael Malkoch ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Self Assembly ◽  
Biomedical Applications ◽  
Nile Red

scholarly journals Photoactive rose bengal-based latex via RAFT emulsion polymerization-induced self-assembly

2021 ◽  
Vol 12 (1) ◽  
pp. 134-147
Author(s):  
Charlène Boussiron ◽  
Mickaël Le Bechec ◽  
Julia Sabalot ◽  
Sylvie Lacombe ◽  
Maud Save
Keyword(s):  
Visible Light ◽  
Emulsion Polymerization ◽  
Rose Bengal ◽  
Self Assembly ◽  
Acrylic Latex

Rose bengal shell- or core-functionalized acrylic latex synthesized by RAFT emulsion PISA: interfacial photosensitized 1O2 production under visible light.

scholarly journals Tuning the membrane permeability of polymersome nanoreactors developed by aqueous emulsion polymerization-induced self-assembly

Nanoscale ◽  
2019 ◽  
Vol 11 (26) ◽  
pp. 12643-12654 ◽  
Author(s):  
Spyridon Varlas ◽  
Jeffrey C. Foster ◽  
Panagiotis G. Georgiou ◽  
Robert Keogh ◽  
Jonathan T. Husband ◽  
...  
Keyword(s):  
Membrane Permeability ◽  
Emulsion Polymerization ◽  
Self Assembly ◽  
Primary Amines ◽  
Cross Linking ◽  
Membrane Modification ◽  
Aqueous Emulsion

Membrane modification of epoxy-functionalized enzyme-loaded polymersomes using a series of primary amines and cross-linking diamines of increasing hydrophobicity resulted in functional nanoreactors with tunable permeability.

scholarly journals Polymerization-induced self-assembly via RAFT in emulsion: effect of Z-group on the nucleation step

2021 ◽  
Vol 12 (1) ◽  
pp. 122-133
Author(s):  
Thiago R. Guimarães ◽  
Y. Loong Bong ◽  
Steven W. Thompson ◽  
Graeme Moad ◽  
Sébastien Perrier ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Self Assembly ◽  
Major Effect

It is demonstrated that the nature of the Z-group of trithiocarbonate RAFT agents can have a major effect on the nucleation step of aqueous RAFT PISA performed as emulsion polymerization.

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