装配式模块化应急移动方舱医院为在工厂进行预制,在紧急情况时候通过现场快速搭建,疫情后可方便拆除,且模块化构建可按需进行二次利用,结合装配式模块化新建的模式,围绕应急方舱医院建设周期短,防疫要求高,平疫结合要求高等特点,采用一体化设计,小母线、无源光网络(PON)等技术方式实现电气系统的快速模块化安装.

The stress relaxation characteristics of four kinds of raw rubber,such as star-shaped solution-polymerized styrene-butadiene rubber(S-SSBR),SSBR 2305 with coupling degree of 40%,emulsion styrene-butadiene rubber(ESBR) and cis-1,4-polybutadiene rubber(BR),and their compounds were studied,and the stress relaxation mechanism was analyzed.The relationship between stress relaxation and extrusion swelling of the compounds was investigated.The results showed that the stress relaxation of all the four kinds of raw rubber and their compounds used in tire tread exhibited two stages,fast and slow relaxation.The stress relaxation mechanism of raw rubbers was found to be that the relaxation of ESBR and BR was deorientation of tangled molecular chains and free molecular chains,while the relaxation of S-SSBR and SSBR 2305 was the deorientation of coupled molecular chains and tangled free molecular chains.The stress relaxation mechanism of rubber compounds was the retraction of rubber-carbon deformation network and deorientation of hindered molecular chains.The fast relaxation of the two kinds of SSBR raw rubber and rubber compounds was more obvious.In the experiment temperature range,with the temperature,the relaxation time of the two kinds of SSBR significantly shortened,ESBR slightly shortened and BR had little change.The stress relaxation time ratios of the raw rubbers to their rubber compounds of S-SSBR and SSBR 2305 respectively were much larger than those of ESBR and BR.Due to their shorter relaxation time,the compounds of S-SSBR and SSBR 2305 has smaller extrusion swelling ratio.

Dynamic reaction blending was used to prepare solution-polymerized styrene-butadiene rubber(SSBR) filled with modified nano-SiO2/carbon black.The modifiers were silane coupling agents bis(triethoxysilylpropyl) tetrasulfide(Si-69) and bis(triethoxysilylpropyl)disulfide(Si-75).The microstructures,mechanical properties,dynamic mechanical properties and so on of the compound were studied.The results showed that the modified nano-fillers were dispersed homogeneously in the compound.The Shore A hardness,elongation at break,permanent set and tear strength decreased,whereas modulus at 300% increased significantly,heat build-up declined obviously when the amount of modified nano-SiO2/carbon black was 70 phr,with the amount of modified nano-SiO2 increased.Otherwise,the SSBR filled with Si-75 modified nano-SiO2/carbon black had better balanced properties.In a word, the SSBR filled with modified nano-SiO2/carbon black by dynamic reaction blending had perfect filler dispersion ability and lower heat build-up.