聚丁二烯接枝聚苯乙烯胶乳的制备及对水泥砂浆的改性

通过半连续乳液接枝聚合法制备了聚丁二烯（PB）/聚苯乙烯（PS）（质量比）为70/30、50/50和30/70的3种PB接枝PS胶乳,采用傅里叶变换红外光谱（FTIR）表征了接枝产物,考察了PB/PS和聚灰比对改性水泥砂浆减水能力、保水率、力学强度以及吸水速率的影响,并采用扫描电子显微镜表征了胶乳改性水泥砂浆的微观结构。结果表明,在FTIR谱图中,不仅出现了PB特征峰,而且出现了PS吸收峰,苯环为单取代,说明PS接枝到PB主链上;PB/PS为30/70的胶乳改性水泥砂浆的减水作用和抗压强度较强,而保水作用最差,PB/PS为50/50的胶乳改性水泥砂浆的抗折强度较高,吸水速率较缓慢;胶乳改性水泥...

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Bibliographic Details
Published in合成橡胶工业 Vol. 37; no. 6; pp. 423 - 428
Main Author 韩莹 赵文杰
Format Journal Article
LanguageChinese
Published 吉林建筑大学材料科学与工程学院,长春,130118%长春工业大学化学工程学院,长春,130012 2014
Subjects
半连续乳液接枝聚合法
微观结构
接枝
改性
水泥砂浆
聚丁二烯
聚苯乙烯
胶乳
改性
水泥砂浆
semicontinuous emulsion graft polymerization method
半连续乳液接枝聚合法
microstructure
graft
聚苯乙烯
polystyrene
聚丁二烯
latex
modification
cement mortar
胶乳
接枝
微观结构
polybutadiene
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ISSN1000-1255

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Summary:通过半连续乳液接枝聚合法制备了聚丁二烯（PB）/聚苯乙烯（PS）（质量比）为70/30、50/50和30/70的3种PB接枝PS胶乳,采用傅里叶变换红外光谱（FTIR）表征了接枝产物,考察了PB/PS和聚灰比对改性水泥砂浆减水能力、保水率、力学强度以及吸水速率的影响,并采用扫描电子显微镜表征了胶乳改性水泥砂浆的微观结构。结果表明,在FTIR谱图中,不仅出现了PB特征峰,而且出现了PS吸收峰,苯环为单取代,说明PS接枝到PB主链上;PB/PS为30/70的胶乳改性水泥砂浆的减水作用和抗压强度较强,而保水作用最差,PB/PS为50/50的胶乳改性水泥砂浆的抗折强度较高,吸水速率较缓慢;胶乳改性水泥砂浆中有桥接结构、互穿网络结构以及孔洞结构。
Bibliography:polybutadiene; graft; polystyrene; latex; semicontinuous emulsion graft polymerization method; modification; cement mortar; microstructure
HAN Ying, ZHAO Wen-jie （ 1. School of Materials Science and Engineering, Jilin Jianzhu University., Changchun 130118, China ; 2. Institute of Chemical Engineering, Changchun University of Technology, Changchun 130012, China）
62-1036/TQ
The polybutadiene grafted polystyrene（ PB-g-PS） latexes with mass ratios of PB to PS70 /30,50 /50,30 /70 were synthesized by semicontinuous emulsion graft polymerization and characterized by Flourier transform infrared spectroscopy. The effects of mass ratios of PB to PS and polymer-cement ratios on water reduction effect,water retention rate, mechanical properties and water absorption rate of PB-g-PS latex modified cement mortars were investigated,and the microstructures of the modified cement mortars were observed by scanning electron microscopy. The results showed that there were not only the characteristic peaks of PB,but also the absorptio
ISSN:1000-1255