Poly(4-diazosulfonate styrene-co-4-vinylpyridine) (P(DSS-co-VP)),containing both H-acceptor moieties of pyridine and photosensitive diazosulfonate groups,was synthesized and has been used for self-assembly as a new co...Poly(4-diazosulfonate styrene-co-4-vinylpyridine) (P(DSS-co-VP)),containing both H-acceptor moieties of pyridine and photosensitive diazosulfonate groups,was synthesized and has been used for self-assembly as a new component.The layer-by-layer deposition between P(DSS-co-VP)and m-methyl phenol formaldehyde resin (MPR) on a substrate via H-bonding interaction was investigated.After UV irradiation the stability of the multiplayer ultra thin film toward polar solvents is improved dramatically.The improvement of the solvent stability of the film should be attributed to the bond conversion between the layers of the film from H-bond to covalent bond under UV irradiation.展开更多
以环境友好性催化剂磺化聚(苯乙烯co 甲基丙烯酸丁酯)[磺化P(St co BMA)]代替传统的浓硫酸催化正丙醇与冰乙酸的酯化反应。实验结果表明,磺化P(St co BMA)对乙酸正丙酯的合成反应具有较好的催化作用。乙酸正丙酯的产率与聚合物催化剂的...以环境友好性催化剂磺化聚(苯乙烯co 甲基丙烯酸丁酯)[磺化P(St co BMA)]代替传统的浓硫酸催化正丙醇与冰乙酸的酯化反应。实验结果表明,磺化P(St co BMA)对乙酸正丙酯的合成反应具有较好的催化作用。乙酸正丙酯的产率与聚合物催化剂的用量有关,当催化剂与正丙醇的质量比为1∶6、酯化反应时间为1 h时,乙酸正丙酯的产率可以达到83 6%以上,且共聚物催化剂经5次使用后仍可使乙酸正丙酯产率达到80 68%。多次使用的催化剂经再生后,其催化活性与新制备的共聚物催化剂相比几乎没有差别。展开更多
文摘Poly(4-diazosulfonate styrene-co-4-vinylpyridine) (P(DSS-co-VP)),containing both H-acceptor moieties of pyridine and photosensitive diazosulfonate groups,was synthesized and has been used for self-assembly as a new component.The layer-by-layer deposition between P(DSS-co-VP)and m-methyl phenol formaldehyde resin (MPR) on a substrate via H-bonding interaction was investigated.After UV irradiation the stability of the multiplayer ultra thin film toward polar solvents is improved dramatically.The improvement of the solvent stability of the film should be attributed to the bond conversion between the layers of the film from H-bond to covalent bond under UV irradiation.
文摘以环境友好性催化剂磺化聚(苯乙烯co 甲基丙烯酸丁酯)[磺化P(St co BMA)]代替传统的浓硫酸催化正丙醇与冰乙酸的酯化反应。实验结果表明,磺化P(St co BMA)对乙酸正丙酯的合成反应具有较好的催化作用。乙酸正丙酯的产率与聚合物催化剂的用量有关,当催化剂与正丙醇的质量比为1∶6、酯化反应时间为1 h时,乙酸正丙酯的产率可以达到83 6%以上,且共聚物催化剂经5次使用后仍可使乙酸正丙酯产率达到80 68%。多次使用的催化剂经再生后,其催化活性与新制备的共聚物催化剂相比几乎没有差别。
