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Comparison of Two Methods in Determining the Composition Distribution of SBS Copolymers
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作者 Xu, J Shi, LH +2 位作者 Ye, ML Wu, JS Liu, Q 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第2期173-175,共3页
The comparison of the determination of chemical composition distributions of butadiene-styrene copolymers, obtained by the formula method and experimental method of GPC, is given in this paper. The relative error of a... The comparison of the determination of chemical composition distributions of butadiene-styrene copolymers, obtained by the formula method and experimental method of GPC, is given in this paper. The relative error of average composition was shown to be less than 5%. The formula method was found to be a more convenient and time-saving approach in the characterization of the copolymer composition distribution. 展开更多
关键词 GPC chemical composition distribution butadiene-styrene copolymer
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Haze insights and mitigation in China: An overview 被引量:12
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作者 Xuliang Zhuang Yuesi Wang +7 位作者 Hong He Jianguo Liu Xinming Wang Tingyu Zhu Maofa Ge Ju Zhou Guiqian Tang Jinzhu Ma 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第1期2-12,共11页
The present article provides an overview of the chemical and physical features of haze in China, focusing on the relationship between haze and atmospheric fine particles, and the formation mechanism of haze. It also s... The present article provides an overview of the chemical and physical features of haze in China, focusing on the relationship between haze and atmospheric fine particles, and the formation mechanism of haze. It also summarizes several of control technologies and strategies to mitigate the occurrence of haze. The development of instruments and the analysis of measurements of ambient particles and precursor concentrations have provided important information about haze formation. Indeed, the use of new instruments has greatly facilitated current haze research in China. Examples of insightful results include the relationship between fine particles and haze, the chemical compositions and sources of particles, the impacts of the aging process on haze formation, and the application of technologies that control the formation of haze. Based on these results, two relevant issues need to be addressed: understanding the relationship between haze and fine particles and understanding how to control PM2.5. 展开更多
关键词 haze secondary aerosols size distribution particles chemical composition
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