Submicrometer core‐shell polybutadiene‐graft‐polystyrene (PB‐g‐PS) copolymers were synthesized by emulsion grafting polymerization with 1,2‐azobisisobutyronitrile as an initiator. Then, PB‐g‐PS copolymers were blended with high‐impact polystyrene (HIPS) and PS to prepare HIPS/PS/PB‐g‐PS. It is generally accepted that PS could only be toughened by 1–3‐μm rubber particles effectively. From the Izod impact test, however, the results showed that PS could be toughened effectively by submicrometer rubber particles (around 300 nm) in our study. Moreover, the impact strength of HIPS/PS/PB‐g‐PS is much higher than that of HIPS due to the synergism between submicrometer rubber particles and micrometer salami particles. Subsequently, the stress‐whitening zones for HIPS, PS/PB‐g‐PS, and HIPS/PS/PB‐g‐PS were also observed in detail by transmission electron microscope. Based on mechanical properties and deformation morphologies, the deformation mechanism in the HIPS/PS/PB‐g‐PS blends was given as follows: crazes could be initiated from large rubber particles, passed through “craze‐bridge” rubber particles, and ended to neighboring small one, which prevented excessively crazing to be form cracks, absorbed energy, and finally enhanced the toughness of PS. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Purpose/Significance. This paper aims to explore the influence mechanism of adolescent health information literacy on health behavior. Method/Process. 13–19 year olds are taken as the survey objects to investigate their health information literacy through a questionnaire. Health information literacy mainly includes health information needs, acquisition, evaluation, use, and behaviors. A total of 252 adolescents’ data were collected in this study, and model testing was performed with the help of regression analysis and structural equation modeling. Conclusion/Results. The results of the study show that adolescents’ health information needs, acquisition, evaluation, and application abilities have a positive impact on health behaviors in the social network environment. Emotional responses and individual cognition as intermediate variables play important roles between health information literacy and health behaviors. Health information needs and health information assessments have the highest impact on mental health and social health, respectively. The society should pay special attention to the influence of adolescents’ health cognition and anxiety on health behavior in the context of social network.