【摘 要】
：
The film formation process of micro-PS particles (diameter 742 nm) and nano-PS particles (diameter 29 nm) wasstudied by atomic force microscopy and differential
【机 构】
：
State Key Laboratory of Polymer Physics & Chemistry
【基金项目】
：
国家重点基础研究发展计划(973计划);国家自然科学基金
论文部分内容阅读
The film formation process of micro-PS particles (diameter 742 nm) and nano-PS particles (diameter 29 nm) wasstudied by atomic force microscopy and differential scanning calorimetry. During a step heating process, the particles wereannealed for 0.5 h at each selected temperature. It was found that the deformation and interdiffusion temperatures of themicro-PS particles are ca. 120-130℃ and 140-150℃, that of the nano-PS particles are 90℃ and 100-110℃ respectively.The DSC traces of nano-PS particles showed that there was an exothermic peak near Tg after annealing for 0.5 h at theselected temperatures below 90℃; otherwise, the exothermic peak disappeared after annealing at 100℃ or above. Comparedwith the micro-PS particles, the sintering process of nano-PS particles occurs at much lower temperature determined by theconfined state of polymer chains with higher conformational energy in nano-particles, and completes in a much narrowertemperature range driven mainly by the larger total surface energy.
其他文献
In the implementation of hyperelliptic curve cryptosystems, a siginificant stepis the selection of secure hyperelliptic curves on which the Jacobian is construc
To search for more better sensitizer of organic solar cell,a series of multidentate squarines(Sq1~6)were synthesized,the structures wcre determined by elemental
Through B3LYP/6-31G** calculations, the 1, 4-pyrone effects on O-H bond dissociation energies (BDEs) of catechols in rings A or B of flavonoids were investigate
标题化合物[Ni（tacn）2]2·[Co（dmg）2Cl2]4·4H2O（C56H112Cl8Co4N28Ni2O20）是由NiCl2·6H2O、CoCl2·6H2O、tacn·3HCl和dmg（丁二酮肟）在甲醇溶液中反应而得。结构通过经石墨单色器单
四氟硼酸银和配体O,O′-双(8-喹啉基)-1,3-二氧丙烷(OPOQ)反应,生成标题配合物[Ag(OPOQ)](BF4) (C21H18AgBF4N2O2 , Mr = 525.05 ), 并通过了元素分析、红外光谱、核磁氢谱及
A spectrometric setup to perform total internal reflection fluorescence (TIRF) and synchronous TIRF measurements at solid/liquid interfaces is presented. The co
Gnetuhainin S, a new resveratrol dimer, was isolated from the lianas of Gnetum hainanense C. Y. Cheng. Its structure and relative configuration were established
Ferric chloride catalyzes the isomerization and cyclization of geraniol, linalool and nerol in acetonitrile giving α-terpineol in good to high yields.
The title compound methyl (7,7-dimethyl-2-amino-4-(4-chlorophenyl)-5-oxo- 5,6,7,8-tetrahydro-4H-benzo-[b]-pyran-3-yl) carboxylate (C19H20ClNO4, Mr = 361.81) was
Searching for special solitary wave solutions with compact support is of important significance in soliton theory. In this paper, to understand the role of nonl