Hard Block Length Distribution in Segmented Block Copolymers

1976 ◽  
Vol 9 (1) ◽  
pp. 58-61 ◽  
Author(s):  
L. H. Peebles
Keyword(s):  
Block Copolymers ◽  
Length Distribution ◽  
Block Length ◽  
Hard Block

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.

Self-assembly assisted polymerization (SAAP): approaching long multi-block copolymers with an ordered chain sequence and controllable block length

2002 ◽  
pp. 2898-2899 ◽  
Author(s):  
Chi Wu ◽  
Zuowei Xie ◽  
Guangzhao Zhang ◽  
Guofu Zi ◽  
Yingfeng Tu ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Block Length ◽  
Chain Sequence

Effect of Block Length and Stereocomplexation on the Thermally Processable Poly(ε-caprolactone) and Poly(Lactic acid) Block Copolymers for Biomedical Applications

2019 ◽  
Vol 1 (12) ◽  
pp. 3354-3365
Author(s):  
Neha Mulchandani ◽  
Arvind Gupta ◽  
Kazunari Masutani ◽  
Sachin Kumar ◽  
Shinichi Sakurai ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Block Copolymers ◽  
Biomedical Applications ◽  
Block Length ◽  
Poly Lactic Acid

Fast track access to multi-block copolymers via thiol-bromo click reaction of telechelic dibromo polymers

2019 ◽  
Vol 10 (31) ◽  
pp. 4259-4270 ◽  
Author(s):  
Valentin P. Beyer ◽  
Beatrice Cattoz ◽  
Anthony Strong ◽  
Daniel J. Phillips ◽  
Andrew Schwarz ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Fast Track ◽  
Click Reaction ◽  
Block Length ◽  
Monomer Composition ◽  
Block Number

Multi-block copolymers offer a plethora of exciting properties, easily tuned by modulating parameters such as monomer composition, block length, block number and dispersity.

Properties of polyether-polyurethane block copolymers: effects of hard segment length distribution

1985 ◽  
Vol 18 (1) ◽  
pp. 32-44 ◽  
Author(s):  
John A. Miller ◽  
Shaow B. Lin ◽  
Kirk K. S. Hwang ◽  
K. S. Wu ◽  
P. E. Gibson ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Hard Segment ◽  
Length Distribution ◽  
Segment Length

Rheological behaviour of block copolymers in the disordered state: effects of molecular weight and block length ratio

Polymer ◽  
1992 ◽  
Vol 33 (2) ◽  
pp. 294-305 ◽  
Author(s):  
Chang Dae Han ◽  
Deog Man Baek ◽  
Jin Kon Kim ◽  
Sung Gun Chu
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Rheological Behaviour ◽  
Length Ratio ◽  
Block Length

Alternating π-conjugated block copolymers with precise block length

2005 ◽  
Vol 43 (16) ◽  
pp. 3574-3587 ◽  
Author(s):  
Jörg Schappel ◽  
Kathrin Schmidt ◽  
Elisabeth Klemm
Keyword(s):  
Block Copolymers ◽  
Block Length
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