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Performance Improvement of Rubber-Modified Polybenzoxazine
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- Authors
- Issue Date
- 1997
- Publisher
- Wiley-Blackwell
- Citation
- Journal of Applied Polymer Science 67, 1–10
- Keywords
- polybenzoxazine ; rubber modification ; fracture toughness ; flexural strength
- Abstract
- Polybenzoxazine as a noble phenolic resin was modified with amine-terminated
butadiene acrylronitrile rubber (ATBN) and with carboxyl-terminated butadiene
acrylronitrile rubber (CTBN) in order to improve its mechanical properties. The fracture
toughness, flexural modulus, and flexural strength of rubber-modified polybenzoxazine
were measured to investigate the effect of rubber modification. In fracture toughness,
ATBN is more effective than CTBN. ATBN-modified polybenzoxazine showed
better distribution of rubber particles in matrix phase than did CTBN-modified polybenzoxazine.
The cure rates in these systems were monitored by differential scanning
calorimetry to investigate the effect of cure rate on rubber size. The change of glass
transition temperatures of rubber-modified polybenzoxazine was measured with a dynamic
mechanical thermal analyzer to explain the variation of mechanical properties.
In addition, the relationship between mechanical properties and the morphology of
rubber-modified polybenzoxazines was also undertaken.
- ISSN
- 0021-8995
- Language
- English
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