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首页> 外文期刊>RSC Advances >A newly designed softoxometalate [BMIm]2[DMIm][α-PW12O40]@hydrocalumite that controls the chain length of polyacrylic acid in the presence of light
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A newly designed softoxometalate [BMIm]2[DMIm][α-PW12O40]@hydrocalumite that controls the chain length of polyacrylic acid in the presence of light

机译：一种新设计的Softoxoralalate [Bmim] 2 [Dmim] [Dmim] [α-PW12O40] @羟氢氧化钇，可在光线下控制聚丙烯酸的链长

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An immediate need in polymer chemistry is to control the chain length of a polymer. Hence it is necessary to develop a strategy that controls the chain length of a polymer. In our present work we have tried to control the chain length of acrylic acid polymer by polymerizing it using a soft-oxometalate (SOM) based catalyst. This soft-oxometalate has a porous material hydrocalumite core and on its pores, a polyoxometalate [BMIm] _(2) [DMMm][α-PW _(12) O _(40) ] ( 1 ) (where BMIm = 1-butyl 3-methylimidazole; DMIm = 1,3-dimethylimidazole). The soft-oxometalate, [BMIm] _(2) [DMIm][α-PW _(12) O _(40) ]@hydrocalumite (SOM 2 ) was synthesized by sonication within an hour. Using this SOM 2 as an initiator catalyst we obtained poly-acrylic acid of MW 1.2 kDa. While using AIBN@hydrocalumite 3 as an initiator catalyst, the M _(W) of PAA is obtained at around 150 kDa. This difference is attributed to the more favourable interaction of ionic POM with inorganic hydrocalumite, as compared to the less favourable interaction of organic AIBN with inorganic hydrocalumite. More favourable interaction of POM 1 with hydrocalumite leads to higher radical generation and hence shorter polymer chains as compared to that in the case of AIBN in 3 , where longer chains are generated due to the low abundance of radicals at the pores of hydrocalumites. SOM 2 was characterized by X-ray diffraction (XRD), horizontally attenuated total reflection infrared spectroscopy (HATR-IR), scanning electron microscopy (SEM), electron dispersive scattering technique (EDS) and dynamic light scattering (DLS).
机译：在聚合物化学中立即需要控制聚合物的链长。因此，有必要制定一种控制聚合物链长的策略。在我们目前的工作中，我们尝试通过使用基于软氧氧酸盐（SOM）的催化剂来控制丙烯酸聚合物的链长。这种软氧化梭酸盐具有多孔材料氢化氢核和其孔，多氧酸盐[Bmim] _（2）[DMMM] [α-PW _（12）O _（40）]（其中Bmim = 1-丁基3-甲基咪唑; DMIM = 1,3-二甲基咪唑）。软氧化术[Bmim] _（2）[DMIM] [α-PW _（12）O _（40）] o _（40）]在一小时内超声合成。使用该SOM 2作为引发剂催化剂，得到MW 1.2 KDA的聚丙烯酸。在使用AIBN @含水色素3作为引发剂催化剂的同时，在约150kDa约为150kDa的Paa的M _（w）。与有机AIBN与无机氢氧化物的较低良好相互作用相比，这种差异归因于离子POM与无机氢氧化物的相互作用。与氢化物质的POM 1更有利地相互作用导致较高的自由基产生，并且与在3中的AIBN中的情况相比，较短的聚合物链，其中由于孔的孔的孔的孔的低丰度而产生更长的链。 SOM 2的特征在于X射线衍射（XRD），水平减弱的全反射红外光谱（HATR-IR），扫描电子显微镜（SEM），电子分散散射技术（EDS）和动态光散射（DLS）。

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