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A kind of intumescent flame retardant (IFR) were used for flame retarding of oil-extended hydrogenated styrene-butylenes-styrene (O-SEBS). The samples were systemically characterized by limited oxygen index (LOI), vertical burning test (UL-94), and scanning electron microscopy (SEM); Thermogravimetric (TG) analysis. The results showed that the IFR retardant can promote residual chars with multi-micro holes on the surface of SEBS to inhibit flame; with 45% IFR content, the LOI is 28.3 and flame retardant level is UL-94 classification of V-0, with no dripping. The morphological structures observed by SEM demonstrated that higher IFR content promote to form larger and compact films cover on bubbles of the intumescent char layer. The TG data revealed that the IFR could change the degradation behavior of the O-SEBS, enhance the thermal stability and increase the char residue, The tensile strength of all the O-SEBS/IFR blends had the tensile strength of more than 4MPa and the elongation of more than 850%.

Bisphenol A bis (diphenyl) phosphate ester (BDP) and a kind of intumescent flame retardant (IFR) were used for flame retarding of oil-extended hydrogenated styrene-butylenes-styrene (O-SEBS). The samples were systemically characterized by TGA, LOI, UL-94, FTIR and FESEM; The results showed that, as a kind of plasticized flame retardant, BDP can improve thermal decomposition temperature and delay decomposition velocity of O-SEBS; while the IFR retardant can promote residual chars with multi-micro holes on the surface of SEBS to inhibit flame; Synergistic flame retarding effects were produced by using BDP and the IFR retardant together, with 20% BDP and 20% IFR, the LOI is 24.5 and flame retardant level is UL-94 classification of V-1, with no dripping. Meanwhile, SEBS-g-MA as compatibility can prompt char residual and thermal property of O-SEBS.

To explore the association between Insertion/Deletion polymorphism of the angiotensin converting enzyme (ACE) gene and the effects of Living High-Exercise High-Training Low (HiHiLo) on muscle oxygenation (MO), Seventy-one healthy men of Han nationality in northern China underwent HiHiLo training for 4 weeks. Training programme was as follows: exposure in hypoxic environment (14.5%~14.8%O2, 10h/day), three times hypoxic training per week (15.4%O2), and training at sea level. Resting MO, exercising MO and resuming MO were measured by non-invasive near infrared spectroscopy (NIRS) before and after the protocol, and the ACE gene I/D polymorphism was detected by PCR. The findings indicated that exercising MO and resuming MO all increased markedly after training (P< 0.05), but resting MO declined. As to genotypes, no significant differences were in the baseline MO among groups before HiHiLo. Increase in resting MO and exercising MO in II and ID groups were more than those in DD groups, but decline in resuming MO in II and ID groups was less than those in DD groups.The present study suggested that HiHiLo could be helpful for developing individual resting MO and exercising MO, but harmful for resuming MO. Moreover, MO of men carrying II and ID probably were more sensitive to the hypoxic training than those carrying DD.

General materials can satisfy the structure strength requirement of space effective payload easily. But it can hardly satisfy the structure stiffness requirement of space payload. Carbon fiber composite has many excellent properties, such as high relative strength, high relative stiffness, small expansion coefficient, good fatigue resistance and excellent vibration resistance. It can be used to make space products. Firstly, this paper discussed the properties of carbon fiber composite material. Compared with common materials, such as aluminum alloy and titanium alloy, carbon fiber composite material is more suitable for applications of space instruments. Secondly, the metal part embedded technique of carbon fiber composite structure was studied. According to the carbon fiber composite structure of a space camera frame, a few structure forms of embedded part ware studied. A space camera frame of carbon fiber composite was designed and manufactured. Finally, finite element analysis and mechanical tests on the space camera frame was carried out. The results reveal that the characteristic frequency of carbon fiber composite frame is up to 104Hz.The space camera frame is of high stiffness and dimensional stability.