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首页> 外文期刊>Journal of Applied Polymer Science >Simultaneous interpenetrating networks consisting of polyurethane and graft vinyl ester resin: Effect of different radical initiators
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Simultaneous interpenetrating networks consisting of polyurethane and graft vinyl ester resin: Effect of different radical initiators

机译：由聚氨酯和接枝乙烯基酯树脂组成的同时互穿网络：不同自由基引发剂的影响

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A series of well-defined graft vinyl ester resins (graft VER), composed of butanol side chain (BO) or poly(oxypropylene) side chains with different molecular weights (200 or 390), were synthesized and characterized. The simultaneous interpenetrating networks (SINS) of graft VER and polyurethane (PU) were prepared. The effect of initiators for graft VER on the morphologies and mechanical properties of PU/graft VER SINS was studied through DSC, SEM, and FTIR observations. For PU/graft VER SIN formed with AIBN as initiator, the morphology and structure of these SINS are mainly controlled by the PU network formed first, and the structure of graft VER has almost no influence on the long-range order structure of hard segments in SIN. For PU/graft VER SIN prepared with BPO/DMA as initiator (redox system), the side-chain structure of graft VER greatly affects the morphologies of these SINS, although the PU network and graft VER network formed almost simultaneously. The reinforcement effect of the graft VER network on the PU network is significantly different by using these two different initiators for graft VER, which could be related with the morphologies of SINS and the formation rate of the two networks. (C) 2002 Wiley Periodicals, Inc. [References: 16]
机译：合成并表征了一系列定义明确的接枝乙烯基酯树脂（接枝VER），其由具有不同分子量（200或390）的丁醇侧链（BO）或聚（氧化丙烯）侧链组成。制备了接枝VER和聚氨酯（PU）的同时互穿网络（SINS）。通过DSC，SEM和FTIR观察，研究了VER引发剂对PU / VER VER SINS的形貌和力学性能的影响。对于以AIBN为引发剂的PU /接枝VER SIN，这些SINS的形态和结构主要受首先形成的PU网络控制，而接枝VER的结构对硬链段的长程结构几乎没有影响。罪。对于以BPO / DMA为引发剂的PU /接枝VER SIN（氧化还原体系），尽管PU网络和接枝VER网络几乎同时形成，但接枝VER的侧链结构极大地影响了这些SINS的形态。通过将这两种不同的引发剂用于接枝VER，接枝VER网络对PU网络的增强效果显着不同，这可能与SINS的形态和这两种网络的形成速率有关。 （C）2002 Wiley Periodicals，Inc. [参考：16]

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