: Copolymers used for transparent fibre glass-reinforced thermoplastic composite -were prepared from methyl methacrylate (.MMA) and styrene (St). Composites containing 20~25 ivt% glass fibre and 0. 7 mm in thickness h...: Copolymers used for transparent fibre glass-reinforced thermoplastic composite -were prepared from methyl methacrylate (.MMA) and styrene (St). Composites containing 20~25 ivt% glass fibre and 0. 7 mm in thickness had an overall optical transmission of 88 ~90%. The gel time and cure time of the prepolymers from MM A and St decreased markedly ivith addition of tiie two linear unsaturated polyesters (.LUPE) and curing process of composite laminate became controlling easily-The effect of the concentration of LUPE on thermal stability of copolymers 晅he optical properties and the hydrothermal sta-bility of composites was investigated by comparing with those of trans-parent unsaturated composites .展开更多
Block copolymers are a class of soft matter that self-assemble to form ordered morphologies on the scale of nanome- ters, making them ideal materials for various applications. These applications directly depend on the...Block copolymers are a class of soft matter that self-assemble to form ordered morphologies on the scale of nanome- ters, making them ideal materials for various applications. These applications directly depend on the shape and size of the self-assembled morphologies, and hence, a high degree of control over the self-assembly is desired. Grafting block copolymer chains onto a substrate to form copolymer brushes is a versatile method to fabricate functional surfaces. Such surfaces demonstrate a response to their environment, i.e., they change their surface topography in response to different external conditions. Furthermore, such surfaces may possess nanoscale patterns, which are important for some applica- tions; however, such patterns may not form with spun-cast films under the same condition. In this review, we summarize the recent progress of the self-assembly of block copolymers grafted onto a flat substrate. We mainly concentrate on the self-assembled morphologies of end-grafted AB dibloek eopolymers, junction p0int-grafted AB diblock copolymers （i.e., Y-shaped brushes）, and end-grafted ABA triblock copolymers. Special emphasis is placed on theoretical and simulation progress.展开更多
Supramolecular polymerization properties have been studied for a series of perylene bisimide(PBI)dyes containing identical hydrogen-bonding amide groups in imide positions but variable number or size of alkoxy substit...Supramolecular polymerization properties have been studied for a series of perylene bisimide(PBI)dyes containing identical hydrogen-bonding amide groups in imide positions but variable number or size of alkoxy substituents in bay-positions.展开更多
文摘: Copolymers used for transparent fibre glass-reinforced thermoplastic composite -were prepared from methyl methacrylate (.MMA) and styrene (St). Composites containing 20~25 ivt% glass fibre and 0. 7 mm in thickness had an overall optical transmission of 88 ~90%. The gel time and cure time of the prepolymers from MM A and St decreased markedly ivith addition of tiie two linear unsaturated polyesters (.LUPE) and curing process of composite laminate became controlling easily-The effect of the concentration of LUPE on thermal stability of copolymers 晅he optical properties and the hydrothermal sta-bility of composites was investigated by comparing with those of trans-parent unsaturated composites .
基金supported by the National Natural Science Foundation of China(Grant Nos.20990234,20925414,and 91227121)the Program for Changjiang Scholars and Innovative Research Team in University,China(Grant No.IRT1257)+1 种基金the Programme of Introducing Talents of Discipline to Universities,Chinaby the Tianhe No.1,China
文摘Block copolymers are a class of soft matter that self-assemble to form ordered morphologies on the scale of nanome- ters, making them ideal materials for various applications. These applications directly depend on the shape and size of the self-assembled morphologies, and hence, a high degree of control over the self-assembly is desired. Grafting block copolymer chains onto a substrate to form copolymer brushes is a versatile method to fabricate functional surfaces. Such surfaces demonstrate a response to their environment, i.e., they change their surface topography in response to different external conditions. Furthermore, such surfaces may possess nanoscale patterns, which are important for some applica- tions; however, such patterns may not form with spun-cast films under the same condition. In this review, we summarize the recent progress of the self-assembly of block copolymers grafted onto a flat substrate. We mainly concentrate on the self-assembled morphologies of end-grafted AB dibloek eopolymers, junction p0int-grafted AB diblock copolymers （i.e., Y-shaped brushes）, and end-grafted ABA triblock copolymers. Special emphasis is placed on theoretical and simulation progress.
文摘Supramolecular polymerization properties have been studied for a series of perylene bisimide(PBI)dyes containing identical hydrogen-bonding amide groups in imide positions but variable number or size of alkoxy substituents in bay-positions.
