scholarly journals Microphase separation of highly amphiphilic, low N polymers by photoinduced copper-mediated polymerization, achieving sub-2 nm domains at half-pitch

2019 ◽  
Vol 10 (46) ◽  
pp. 6254-6259 ◽  
Author(s):  
Ellis Hancox ◽  
Evelina Liarou ◽  
James S. Town ◽  
Glen R. Jones ◽  
Siân A. Layton ◽  
...  
Keyword(s):  
Phase Separation ◽  
Block Copolymers ◽  
Polyacrylic Acid ◽  
Microphase Separation

Fluoro-polyacrylic acid block copolymers with vary narrow dispersity are shown to have sub-2 nm domain sizes on phase separation.

Phase Separation in Thermosetting Blends of Epoxy Resin with PS-b-PCL and PI-Si Block Copolymers

2014 ◽  
Vol 936 ◽  
pp. 95-98
Author(s):  
Jin Dian Ding ◽  
Wei Zhen Li ◽  
Tian Qi Jiang ◽  
Zong Lian Xia ◽  
Wen Jun Gan
Keyword(s):  
Phase Separation ◽  
Block Copolymers ◽  
Diblock Copolymer ◽  
Ring Opening ◽  
Microphase Separation ◽  
Ring Opening Polymerization ◽  
Lithium Aluminum ◽  
Ps I ◽  
Atomic Transfer Radical Polymerization ◽  
Copolymer Poly

Amphiphilic Diblock Copolymer Poly(styrene-b-ε-Caprolactone) were Synthesized. Firstly, Polystyrene was Synthesized via Sequential Atomic Transfer Radical Polymerization (ATRP), and then the Tetra Hydro Lithium Aluminum (LiAlH4) was Used as a Reducing Agent in Tetra Hydro (THF) to Reduce Polystyrene to the Pre-Polymer Monohydroxy-Terminated Polystyrene (PS-OH). as Following, Amphiphilic Diblock were Obtained by Ring Opening Polymerization. and the Structure of Diblock Polymer was Investigated by FTIR. Furthermore, the Block Copolymers were Added into the Mixture of Epoxy and me-THPA. and the Optical Microscopy(OM) Shows that the Microphase Separation Occured in this System and the PS-b-PCL can Promote the Phase Separation in the System.

Effect of Block Molecular Weight on the Mechanical Properties of PA1010-b-PEG Segmented Block Copolymers

2012 ◽  
Vol 512-515 ◽  
pp. 2127-2130
Author(s):  
Li Huo ◽  
Cai Xia Dong
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Soft Segment ◽  
Mechanical Measurements ◽  
Wide Range ◽  
Hard Block ◽  
Higher Temperature ◽  
Hard Segments

The mechanical properties were investigated of a series of PA-PEG thermalplastic elastomer based on PA1010 and polytetramethylene glycol (PEG) with varying hard and soft segment content. Dynamic mechanical measurements of these polymers have carried out over a wide range of temperatures. The block copolymers exhibit three peaks, designated as α, β and γ in the tanδ-temperature curve. The α transition shifts to higher temperature with increasing hard block molecular weight. However, at a constant hard molecular weight, the α transition shifts to higher temperature and the damping increases on increasing the soft segment molecular weight. DMA results show that the block copolymers exhibit a microphase separation structure and both soft and hard segments were found to be crystallizable. The degree of phase separation increases with increasing hard block molecular weight.

Phase behaviors of side chain liquid crystalline block copolymers

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1514-1521 ◽  
Author(s):  
Xiaokang Li ◽  
Feng Huang ◽  
Tao Jiang ◽  
Xiaohua He ◽  
Shaoliang Lin ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Liquid Crystalline ◽  
Microphase Separation ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Side Chain ◽  
Phase Behaviors

The microphase separation of side chain liquid crystalline (SCLC) block copolymers was studied using dissipative particle dynamics (DPD) simulations.

scholarly journals The crystallinity, thermal properties and microscopic morphology of di-block copolymers of l-lactide and several acrylates

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31934-31946 ◽  
Author(s):  
Wei-Wei Wang ◽  
Long Jiang ◽  
Wu-Yang Ren ◽  
Chun-Mei Zhang ◽  
Chang-Zhen Man ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Microscopic Morphology

Di-block copolymers of l-lactide and (meth)acrylate were synthesized from PLLA macroinitiators, and the microphase separation of copolymers was observed.

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