Influence of hydrophilic–lipophilic balance of nonionic emulsifiers on emulsion copolymerization of styrene and methacrylic acidSpringer Science and Business Media LLC - Tập 285 - Trang 1755-1761 - 2007
Masayoshi Okubo, Amorn Chaiyasat, Masahiro Yamada, Toyoko Suzuki, Hiroshi Kobayashi
Emulsion copolymerizations of styrene and methacrylic acid (MAA) with various nonionic emulsifiers having a hydrophilic–lipophilic balance (HLB) range of 13.7–17.2 were performed to clarify the influence of emulsification state on polymerization. The emulsification state with a lower-HLB value emulsifier was worse than that with a higher one. In the lowest HLB value, MAA was predominantly polymeri...... hiện toàn bộ
The βα growth transition of isotactic polypropylene during stepwise crystallization at elevated temperatureSpringer Science and Business Media LLC - Tập 293 - Trang 2823-2830 - 2015
Jiying Wang, Zhongjie Ren, Xiaoli Sun, Huihui Li, Shouke Yan
Growth transition from β-isotactic polypropylene (iPP) to its α phase during the stepwise crystallization process is investigated. β-iPP hexagonites and spherulites are prepared first at 135 °C by using pimelic calcium as a nucleation agent, and transformation of them to their α-counterparts is realized by continuous isothermal crystallization at elevated temperatures, e.g., 151 °C. The β to α gro...... hiện toàn bộ
Nonequilibrium structure of primary particles in colloidal bidispersionSpringer Science and Business Media LLC - Tập 288 - Trang 1485-1493 - 2010
Junjun Jia, Shuichi Iwata
The nonequilibrium aggregation structure of primary particles in colloidal bidispersions is investigated at high volume fractions by Brownian dynamics simulations. It is found that introducing limited different sized particles in the monodispersion can obviously affect the short-range structures of primary particles. In a bidispersion, fractal dimension of aggregates, only consisting of primary pa...... hiện toàn bộ
Quantitative determination of large structures by small-angle light scatteringSpringer Science and Business Media LLC - Tập 279 - Trang 166-170 - 2001
H. J. Vogel, G. Baur, W. Burchard
A new small-angle light scattering camera has been developed. In contrast to conventional detection the present system is based on a recently developed two-dimensional charge-coupled-device chip made by Thomson (France). The advantage of this chip is its excellent linear response and very low dark signal even at room temperature. The best linearity was obtained by leading each pixel signal throug...... hiện toàn bộ