HTPB-based Polyurethanes: a Correlation Study Between Morphology and Mechanical Behaviour

Hydroxyl‐terminated polybutadiene and tolylene diisocyanate were used to prepare two series of polyurethanes by a two‐step process. In the first series, the prepolymers were chain‐extended with aliphatic compounds (1,3‐propanediol, 1,4‐butanediol and 1,6‐hexanediol) and in the second, an aromatic ch...

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Bibliographic Details
Published in:Polymer international 1997-04, Vol.42 (4), p.422-428
Main Authors: Zawadzki, Sônia Faria, Akcelrud, Leni
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
hydroxyl-terminated polybutadiene
Mechanical properties
morphology
Organic polymers
Physicochemistry of polymers
polyurethanes
Properties and characterization
thermal properties
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Summary:Hydroxyl‐terminated polybutadiene and tolylene diisocyanate were used to prepare two series of polyurethanes by a two‐step process. In the first series, the prepolymers were chain‐extended with aliphatic compounds (1,3‐propanediol, 1,4‐butanediol and 1,6‐hexanediol) and in the second, an aromatic chain extender (dihydroxy isopropyl‐N‐aniline) was used. Some results from mechanical testing showed different trends in comparison with previously reported results for similar systems. These findings were interpreted in terms of reactant reactivity, experimental procedures and morphology. Morphology was studied by means of swelling experiments, differential scanning calorimetry and scanning electron microscopy. © of SCI.
ISSN:0959-8103
1097-0126
DOI:10.1002/(SICI)1097-0126(199704)42:4<422::AID-PI737>3.0.CO;2-T