【摘 要】
：
In the polymerization process of methyl methacrylate (MMA), the Arrhenius parameters (activation energy and frequency factor) of propagating reaction monotonica
【出 处】
：
Chinese Chemical Letters
论文部分内容阅读
In the polymerization process of methyl methacrylate (MMA), the Arrhenius parameters (activation energy and frequency factor) of propagating reaction monotonically decrease with increasing monomer conversion. At the beginning and middle stage of the propagating reaction, the increase of radical chain length is the main reason of above mentioned change. And at the end stage, the sharp decrease of kp indicates that the activation energy is approximately incline to zero and the propagating reaction is controlled by molecular diffusion motion.
In the polymerization process of methyl methacrylate (MMA), the Arrhenius parameters (activation energy and frequency factor) of propagating reaction monotonically decrease with increasing monomer conversion. At the beginning and middle stage of the propagating reaction, the increase of radical chain length is the And at the end stage, the sharp decrease of kp indicates that the activation energy is approximately incline to zero and the propagating reaction is controlled by molecular diffusion motion.
其他文献
ＳｉｎｃｅＩｓｈｉｈａｒａｅｔａｌ[1 ] ｒｅｐｏｒｔｅｄｔｈａｔａｎｅｗｍａｃｒｏｍｏｌｅｃｕｌｅｓｙｎｄｉｏｔａｃｔｉｃ ｐｏｌｙｓｔｙｒｅｎｅ (ｓ ＰＳ )ｃｏｕｌｄｂｅｐｒｏｄｕｃｅｄｗｉｔｈｈｉｇｈｓｔｅｒｅｏｒｅｇｕｌａｒｉｔｙｂｙｕｓ ｉｎｇ (η5 ?
Since Ishihara et al [1] reportedthatanewmacromoleculesyndiotactic polystyrene (s PS) could not be produced withhighs
目的研究瑞舒伐他汀对急性冠状动脉综合征（Acute coronary syndrome,ACS）患者经皮冠状动脉介入（Percutaneous coronary intervention,PCI）术后血脂、hs-CRP水平及再狭窄的影响。
High-density polyethylene (HDPE) films were irradiated by 60Co gamma ray with a dose of 100 kGy in air and then immersed in aqueous solution of acrylic acid (A
缩短学术论文发表周期,是尽早实现其社会效益的前提,也是尊重作者创造性劳动成果、使之在社会上获得“优先权”荣誉的可靠保障(发明创造成果的“优先权”通常以出版时间为准)
近年来,以《舌尖上的中国》为代表的美食类纪录片风靡全国,尤其是《舌尖上的中国》更是打着国际传播的名号,在世界各地放映传播。那么根据跨文化传播理论,《舌尖上的中国》是
The overall cross-linking copolymerization of acrylic acid and multi-armed cross-linkers are investigated by in situ interferometry. The results show that the
电影《秋之白华》中冯小轩形象也非常鲜明。她是一位开朗、热情的女性,为了逃婚来到上海。但在时代的潮流中,她对革命的认知由好奇、羡慕走向回避、退缩,从梦中惊醒复归到梦
众所周知,由于晶体管元件物理特性,容易产生热故障。它在常温时工作正常,在较高温度时呈现热故障,这往往给检查带来困难。我们用钳形电流表较快地查出此类故障。
It is wel
我科自1994年以来,在常规治疗的基础上,加用复方丹参和维生素C治疗小儿肺炎,效果满意,现总结报告如下: 1 临床资料 1.1 一般资料 共观察小儿肺炎急性期住院患儿40例,随机分
A novel reactive resin as active support was synthesized by an improved method based on seed swelling and surface coating polymerization. The resin is monosize