中文摘要：

聚（2-丙烯酰胺甲基-6-十二烷基硼酸二乙醇胺酯）（PADB）是一类两亲性聚硼酸酯.本文通过表面张力法考察了不同相对分子质量的PADB水溶液的表面活性; 重点研究了PADB与十二烷基苯磺酸钠（SDBS）在0.5 mol.L-1 NaCl溶液中的相互作用,通过正规溶液理论,计算PADB/SDBS混合体系的胶束化参数,并与单体ADB/SDBS混合溶液体系进行了比较.结果表明,PADB相对分子质量可达1.5×104-3.5×104,随分子量增加,PADB水溶液中临界胶束浓度（cmc）增大,但cmc时的表面张力（γcmc）维持在31 mN.m-1左右（298 K）; 加入PADB后,SDBS溶液表面张力-浓度对数（γ-lgc）曲线出现两处转变点,即c1和c2点,但c1和c2皆小于纯SDBS溶液的临界胶束浓度（cmcSDBS）,临界胶束浓度（cmcSDBS），即c1〈c2〈cmcSDBS．PADB加入量越大，相对分子质量越低，SDBS溶液的表面活性越强．将聚硼酸酯PADB溶液视为特殊状态的单体ADB溶液，通过近似处理，计算得到PADB／SDBS混合胶束中相互作用参数βrn在-2．4到-4．7之间，活度系数f1m〈1，表明聚硼酸酯PADB与SDBS有较强的相互作用；当混合体系中PADB的ADB结构单元摩尔分数x1为0．47时，｜βm｜达到最大．相比于单体ADB／SDBS混合体系，当x1〈0．8时，PADB／SDBS混合体系｜βm｜值较大，相互作用更强；随x1增大，混合胶束中聚合物PADB的ADB结构单元摩尔分数x｜βm｜不断增加，但其值低于ADB／SDBS混合体系．

英文摘要：

Poly（6-dodecyl-2-（acrylamidomethoxy）-1,3,6,2-dioxaza borocane）（PADB） is a novel amphiphilic polyborate.The surface activity of the polyborate PADB with various weight-average molecular weights（Mw） in an aqueous solution was measured by surface tension methods.Using regular solution theory,the interaction between PADB and sodium dodecylbenzene sulfonate（SDBS） in 0.5 mol.L-1 NaCl aqueous solution was studied and compared with the monomeric ADB/SDBS mixed system.Results showed that the Mw of the polyborate PADB ranges from 1.5×104 to 3.5×104.The increasing Mw of PADB raises their critical micelle concentration（cmc） in aqueous solutions,however,the surface tension at cmc（γcmc） can also reach about 31 mN.m-1（298 K）,which indicates excellent surface activity.By PADB addition,twoActa Phys.-Chim.Sin.,2010 Vol.26 transitions occurred in the curves of the surface tension（γ） vs logarithm concentration of SDBS（lgcSDBS） and were labeled c1 and c2,respectively,and with c1c2cmcSDBS.The surface activity of the SDBS aqueous solution increases with PADB addition and the reduction of its Mw.The PADB solution can be regarded as a special monomeric ADB solution.The micellization parameters of the PADB/SDBS mixed solution were calculated by regular solution approximation.The interaction parameter βm value of the PADB/SDBS mixed micelles is about-2.4--4.7,the activity coefficient f1m1,demonstrating a strong synergistic interaction between PADB and SDBS.｜βm｜ reaches a maximum when the molar fraction（x1） of the monomeric ADB unit of PADB in the mixed surfactants is 0.47.By comparison to the monomeric ADB/SDBS mixed system,the PADB/SDBS system possesses a larger ｜βm｜ value when x1 is below 0.8 and a stronger interaction effect is apparent.As x1 increases,the molar fraction（x1m） of the monomeric ADB unit of PADB in the PADB/ SDBS mixed micelles increases linearly but this increase is less than that of the monomeric ADB/SDBS mixed system.