The phase behaviors of a polydimethylsiloxane-b-poly(2-vinylpyridine) block copolymer (PDMS-b-P2VP, DV) tuned by the supramolecular self-assembly approach with the 1-pyrenebutyric acid (PBA) as additive were investigated. The PDMS-b-P2VP block copolymer (D_10kV_12.5k, the molecular weight of the PDMS and P2VP were 10000 and 12500 g mol⁻¹, respectively) with volume fraction of P2VP (f_P2VP) 52% exhibited hexagonally perforated layer (HPL) morphology after dried from the solution, and the nanostructure transformed to gyroid structure after thermal annealing above 140 ^oC, which were indicated by the small-angle X-ray diffraction (SAXS) and transmission electron microscopy (TEM) results. Through solution blending method, a series of H-bonding supramolecular complexes of PDMS-b-P2VP with PBA were fabricated. The Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) experiments demonstrated that the PBA molecules uniformly interacted with P2VP through H-bonding and the glass transition temperature of P2VP(PBA)_x decreased with the increase of the mole ratio (x) of PBA/2VP. Due to the increase of the volume fraction of P2VP(PBA)_x and that of the stretching extent of the P2VP backbone as the x value increased, the microphase-separated nanostructures transformed from HPL to hexagonally packed cylinder (HEX), then to body centered cubic (BCC) structure and then to disordered spheres morphologies. When the PDMS-b-P2VP(PBA)_x complexes were heated above 120 ^oC, the H-bonding between the P2VP and PBA was broken and the PBA became compatible within both PDMS and P2VP domains and thus the nanostructure of the PDMS-b-P2VP(PBA)_x complexes transformed accordingly. Therefore, a variety of the nanostructures and structural transformations were induced by the H-bonding formation and disassociation based on one block copolymer.

研究了通过超分子自组装方法以1-吡咯丁酸（PBA）为添加剂对聚二甲基硅氧烷-b-聚（2-乙烯基吡啶）嵌段共聚物（PDMS- b -P2VP，DV）的相行为。PDMS- b -P2VP嵌段共聚物（D _10k V _12.5k，PDMS和P2VP的分子量分别为10000和12500 g mol ^-1），P2VP（f _P2VP）的体积分数为52％，呈现六边形穿孔层（从溶液中干燥后的HPL）形态，并且在140 ^{o C}以上的热退火后，纳米结构转变为gyroid结构C，由小角度X射线衍射（SAXS）和透射电子显微镜（TEM）表示。通过溶液共混法，制备了PDMS- b- P2VP与PBA的一系列H键超分子配合物。傅里叶变换红外（FTIR）光谱和差示扫描量热法（DSC）实验表明，PBA分子通过H键与P2VP均匀相互作用，并且P2VP（PBA）_x的玻璃化转变温度随着摩尔比的增加而降低（x）。由于P2VP（PBA）_x的体积分数的增加以及P2VP骨架作为x的拉伸程度的增加值增加，微相分离的纳米结构从HPL转变为六方堆积的圆柱（HEX），然后转变为体心立方（BCC）结构，然后转变为无序的球体形态。当将PDMS- b -P2VP（PBA）_x配合物加热到120 ^o C以上时，P2VP和PBA之间的氢键断裂，PBA在PDMS和P2VP域内都变得相容，因此PDMS- b的纳米结构-P2VP（PBA）_x复合体进行了相应的转换。因此，通过基于一种嵌段共聚物的H键形成和离解，诱导了多种纳米结构和结构转变。