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反式-/顺式-1,4-聚异戊二烯共混体系的结晶动力学 被引量:3

Crystallization Kinetics of trans-/cis-Polyisoprene Blends
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摘要 采用差示扫描量热(DSC)法对反式-/顺式-1,4-聚异戊二烯共混体系的等温及非等温结晶动力学进行了研究,分别采用Avrami方程和莫志深法对其动力学参数进行了解析.研究结果表明,在反式-/顺式-1,4-聚异戊二烯共混体系的等温及非等温结晶过程中,顺式-1,4-聚异戊二烯(CPI)组分的存在会降低反式-1,4-聚异戊二烯(TPI)组分的结晶速率;在等温结晶过程中,CPI组分会提高TPI组分自身的结晶度;而非等温结晶过程中,CPI则提高了共混物中β晶型的相对含量. Isothermal and non-isothermal crystallization kinetics of cis-1,4-polyisoprene(CPI)/trans-1,4-polyisoprene(TPI) binary blends were investigated by differential scanning calorimetry method. The results were analyzed by Avrami equation and MO theory. It was found that the presence of CPI suppressed the crystallization rate of TPI component during both isothermal and non-isothermal crystallization. The crystallinity of TPI component was enhanced by CPI during the isothermal crystallization. For non-isothermal crystallization,the relative content of β crystal form increased,while the crystallinity of TPI component changed little with the incorporation of CPI component.
出处 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2016年第12期2315-2322,共8页 Chemical Journal of Chinese Universities
基金 国家"九七三"计划项目[批准号:2015CB654700(2015CB654706)] 国家自然科学基金(批准号:51473083) 山东省重点项目研发计划(批准号:2015GGX102019) 泰山学者工程及黄河三角洲学者工程专项经费资助~~
关键词 聚异戊二烯 双组分共混 等温结晶 非等温结晶 Polyisoprene Binary blend Isothermal crystallization Non-isothermal crystallization
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  • 1Ozawa T. Kinetics of non-isothermal crystallization [J]. Polymer, 1997, 12(3) :150 - 158.
  • 2Jeziomy A. Parameters characterlng the kinetics of the nonisothermal crystallization of poly( ethylene terephthalate)determined by DSC[J]. Polymer,1978,19(10) :1142 - 1144.
  • 3Liu Tianxi, Mo Zhishen, Wang Shanger, et al. Nonisothermal melt and cold crystallization kinetics of poly (aryether ether ketone ketone) (PEEKK) [J]. Polym Engng Sci, 1997, 37 (3) : 568 -575.

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