Four siloxane-containing benzoxazine monomers and telechelic benzoxazine oligomers were synthesized from 1,3-bis(3aminopropyl)-1,1,3,3-tetramethyldisiloxane, a,x-bis(3-aminopropyl)polydimethylsiloxane, phenol, o-allylphenol, and formaldehyde. The length of the siloxane segment affects the polymerization reaction of the benzoxazine monomers and telechelic benzoxazine oligomers. The dynamic mechanical properties of the corresponding polybenzoxazines depend primarily on the structure of phenol and the length of the siloxane segment. The polybenzoxazines exhibit one-way dual-shape memory behavior in response to changes in temperature. The thermally induced shape memory effects of the polybenzoxazines were characterized by bending and tensile stress-strain tests with a temperature program based on their glass transition temperatures. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44121.

Three difunctional benzoxazines were synthesized from cresol isomers (o-, m-, and p-methylphenols), 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, and formaldehyde. The ring-opening polymerization temperature decreases in the order of ortho-, para-, and meta-positions of methyl group for the benzoxazine monomers, whereas the glass transition temperature increases in the order of ortho-, para-, and meta-positions of methyl group for the resultant polybenzoxazines. In addition, the polybenzoxazines exhibit one-way dual-shape-memory behavior in response to changes in temperature, and the shape-memory effects are evaluated by tensile and bending tests with a temperature program based on glass transition temperature. The o-and p-cresol-based polybenzoxazines exhibit higher shape-memory performance than their m-cresol-based analogue/counterpart. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45443.

Purpose: This study aims to explore the psychological status of suspected COVID-19 patients during quarantine and put forward a new yet effective psychological nursing strategy for intervention. Patients and Methods:We performed a retrospective study with suspected COVID-19 patients who were hospitalized to the two hospitals of Hunan province, China and accepted the intervention of psychological nursing from 01/2020 to 03/2020. The control group received routine psychological nursing care and the observation group received the new psychological nursing intervention according to Pygmalion effect. Results: A total of 89 objects were included in the analysis. Results of the questionnaire before intervention showed that the majority of isolated suspected COVID-19 patients showed negative emotions, with the incidence of depression (51.69%), anxiety (14.617%), inverted provocation (22.47%), extraverted provocation (25.84%). And the extraverted provocation scores of female patients was significantly higher than that of male counterparts (P < 0.05). At discharge, compared with the control group, the scores of depression, anxiety, introversion and extraversion of patients in the observation group were significantly lower after nursing intervention based on Pygmalion effect. The satisfaction rate of psychological care based on Pygmalion effect was 86.66%. Conclusion: Suspected COVID-19 patients tend to show the symptoms of depression, anxiety and irritation during quarantine. The psychological nursing based on Pygmalion effect is helpful to alleviate their negative emotions.

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