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Hydroxyl-terminated polybutadiene (HTPB) is a curing adhesive that is commonly used in the production of ammunition, and it emerged during the time of war. After entering the peaceful era, several countries around the globe have focused on the destruction of expired ammunition using safe and economical methods in terms of consumption of energy. Microorganisms exhibit a highly efficient and environment friendly degradation capability for variety of refractory substances. Therefore, in this study we screened five strains of microorganisms from five environmental soil samples for their ability to degrade HTPB. These microorganisms were identified as  Microbacterium trichothecenolyticum ,  Microbacterium esteraromaticum ,  Arthrobacter pascens ,  Pseudonocardia carboxydivorans  and  Ochrobactrum anthropic  based on 16S rRNA gene similarity index. We observed the uncorroded and corroded HTPB sample through scanning electron microscopy and observed the formation of lot of holes and gullies in HTPB after corrosion. An 18S rRNA gene clone library was constructed for HTPB-degrading fungi. Based on the results of library evaluation, it was found that the structure of the HTPB-degrading fungi community was relatively simple. A total of 54 positive clones were obtained. These clones represented some uncultured microorganisms that were closely related to  Scytalidium lignicola ,  Pseudokahliella  and  Gonostomum strenuum . This study will help in the implementation of environment friendly degradation strategies for HTPB degradation.

Microbial degradation and community structure analysis of hydroxyl-terminated polybutadiene (HTPB)