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首页> 外文期刊>Journal of Applied Polymer Science >Polymerization of epoxidized soybean oil with maleinized polybutadiene
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Polymerization of epoxidized soybean oil with maleinized polybutadiene

机译：环氧大豆油与马来化聚丁二烯的聚合

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Epoxidized soybean oil (ESO) triglycerides were reacted with maleinized polybutadiene (MMPBD) to give plant-oil-based thermoset polymers. MMPBD samples were of two different molecular weights [high-molecular-weight maleinized polybutadiene (MMPBD-H), maleate content = 10%, number-average molecular weight (Mn) = 9000, and low-molecular-weight maleinized polybutadiene (MMPBD-L), maleate content = 15%, M_n = 5000]. To increase the crosslink density of the product, a free-radical initiator, benzoyl peroxide, was added to this mixture to further crosslink MMPBD through its double bonds. The characterizations of the products were done by dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, and IR spectroscopy. The ESO-MMPBD polymers were crosslinked rigid infusible polymers. ESO-MMPBD-H-1: 1 and ESO-MMPBD-L-1: 1 showed glass-transition temperature values at -23, 78 and -17, 64°C, respectively, whereas the storage moduli of the two polymers at 25°C were 13 and 16 MPa, respectively. The storage moduli of the polymers remained the same or decreased with the addition of a free-radical initiator. The storage moduli also decreased with increasing ESO concentration above a 1: 1 epoxy-to-anhydride molar ratio. The surface hardness increased dramatically, and the equilibrium swelling ratio decreased with the addition of free-radical initiator.
机译：使环氧大豆油（ESO）甘油三酸酯与马来化聚丁二烯（MMPBD）反应，得到植物油基热固性聚合物。 MMPBD样品具有两种不同的分子量[高分子量马来化聚丁二烯（MMPBD-H，马来酸酯含量= 10％，数均分子量（Mn）= 9000，低分子量马来化聚丁二烯（MMPBD- L），马来酸盐含量= 15％，M_n = 5000]。为了增加产物的交联密度，将自由基引发剂过氧化苯甲酰加入到该混合物中，以通过其双键进一步交联MMPBD。通过动态力学分析，差示扫描量热法，热重分析和红外光谱对产品进行表征。 ESO-MMPBD聚合物是交联的刚性不溶性聚合物。 ESO-MMPBD-H-1：1和ESO-MMPBD-L-1：1的玻璃化转变温度分别为-23、78和-17、64°C，而两种聚合物的储能模量分别为25 ℃分别为13和16MPa。通过添加自由基引发剂，聚合物的储能模量保持相同或降低。当环氧乙烷与酸酐的摩尔比超过1：1时，随着ESO浓度的增加，储能模量也降低。随着自由基引发剂的加入，表面硬度急剧增加，平衡溶胀率降低。

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