膨胀淀粉作为苯乙烯和甲基丙烯酸甲酯原子转移自由基聚合（ATRP）中的通用材料。

Expanded corn starch as a versatile material in atom transfer radical polymerization (ATRP) of styrene and methyl methacrylate.

机构信息

CSIR-Indian Institute of Petroleum, Dehradun 248005, Uttarakhand, India.

出版信息

Carbohydr Polym. 2015 Oct 5;130:290-8. doi: 10.1016/j.carbpol.2015.05.009. Epub 2015 May 18.

DOI:10.1016/j.carbpol.2015.05.009

Abstract

Polymerization of styrene (St) and methyl methacrylate (MMA) was performed by surface initiated (SI) and activator generated by electron transfer (AGET) systems of atom transfer radical polymerization (ATRP) using renewable expanded corn starch (ECS) as a support. This prepared ECS is found to have V type crystallinity with 50 m(2)g(-1) surface area (<1m(2)g(-1) for corn starch (CS)) and average pore volume of 0.43 cm(3)g(-1) (<0.1cm(3)g(-1) for CS). In SI-ATRP, hydroxyl groups on ECS were converted into macro-initiator by replacing with 2-bromoisobutyryl bromide (BIBB) with a 0.06 degree of substitution determined from NMR. In AGET-ATRP, CuBr2/ligand complex get adsorbed on ECS (Cu(II)/ECS=10 wt.%) to catalyze the polymerization. Synthesized PS/PMMA was characterized by SEM, FT-IR, (1)H NMR.

摘要

采用原子转移自由基聚合（ATRP）的表面引发（SI）和电子转移引发剂（AGET）体系，将苯乙烯（St）和甲基丙烯酸甲酯（MMA）聚合，以可再生的膨胀玉米淀粉（ECS）为载体。所制备的 ECS 具有 V 型结晶度，比表面积为 50 m(2)g(-1)（玉米淀粉（CS）为 <1m(2)g(-1)），平均孔体积为 0.43 cm(3)g(-1)（CS 为 <0.1cm(3)g(-1)）。在 SI-ATRP 中，通过用 2-溴异丁酰溴（BIBB）取代，将 ECS 上的羟基转化为大分子引发剂，取代度为 0.06，由 NMR 确定。在 AGET-ATRP 中，CuBr2/配体络合物吸附在 ECS 上（Cu(II)/ECS=10wt.%）以催化聚合。合成的 PS/PMMA 通过 SEM、FT-IR、（1）H NMR 进行了表征。