β-Nucleation effects induced by long chain branching polypropylene

doi:10.11949/j.issn.0438-1157.20150846

CIESC Journal ›› 2015, Vol. 66 ›› Issue (9): 3788-3794.DOI: 10.11949/j.issn.0438-1157.20150846

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β-Nucleation effects induced by long chain branching polypropylene

ZHOU Shuai¹, XIN Zhong^1,2, WANG Weixia¹, ZHAO Shicheng¹, SHI Yaoqi³

1 State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
3 Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai Research Institute of Chemical Industry, Shanghai 200062, China

Received:2015-06-08 Revised:2015-06-15 Online:2015-09-05 Published:2015-09-05
Supported by:
supported by the National Natural Science Foundation of China (21476085, 21306047)and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (22A201514016, 222201314051).

长支链聚丙烯诱导β晶成核效应

周帅¹, 辛忠^1,2, 王卫霞¹, 赵世成¹, 石尧麒³

1 华东理工大学化工学院, 化学工程联合国家重点实验室, 上海 200237;
2 华东理工大学化工学院, 上海市多相结构材料化学工程重点实验室, 上海 200237;
3 上海化工研究院, 上海市聚烯烃催化技术重点实验室, 上海 200062

通讯作者: 辛忠
基金资助:
国家自然科学基金项目(21476085,21306047);中央高校基本科研业务费专项资金(22A201514016,222201314051)。

Abstract

Abstract:

Taking advantages of long chain branching polypropylene based on grafting vinyl polydimethylsiloxane/ styrene (PP-g-VS/St) can generate β-crystal polypropylene under shear and high cooling rate condition, PP-g-VS/St was used as a polymeric β-nucleating agent for isotactic polypropylene (iPP) under injection modeling processing and its effects on the crystallization temperature, crystal structure and mechanical properties of iPP were investigated. The results indicated that the crystallization temperature, β-crystal relative content and mechanical properties of modified iPP were improved as increasing the content of PP-g-VS/St. The crystallization temperature of modified iPP with 50% (mass) PP-g-VS/St increased by 10℃ compared with that of virgin iPP and the β-crystal relative content reached 32.8%. The impact strength, flexural modulus and tensile strength were enhanced by 355.3%, 53.8% and 15.9%, respectively, compared with those of virgin iPP. These results may provide a new method to design polymeric β-nucleating agent for iPP.

Key words: β-crystal, nucleating agent, long chain branching polypropylene, mechanical properties

摘要：

利用乙烯基聚二甲基硅氧烷/苯乙烯接枝型长支链聚丙烯(PP-g-VS/St)在剪切和快速降温过程中可以诱导形成β晶聚丙烯这一优势,研究了PP-g-VS/St在注塑加工过程中作为高分子β晶成核剂对等规聚丙烯(iPP)结晶温度、晶体结构及力学性能的影响。结果表明改性聚丙烯的结晶温度、β晶相对含量和力学性能随着PP-g-VS/St添加量的增加而增加。当PP-g-VS/St的添加量为50%(质量分数)时,改性聚丙烯的结晶温度相对于纯iPP提高约10℃,β晶相对含量达32.8%,冲击强度、弯曲模量和拉伸强度分别相对于纯iPP提高了355.3%、53.8%和15.9%。这些结果为聚丙烯高分子β晶型成核剂的设计提供了新思路。

关键词: β晶, 成核剂, 长支链聚丙烯, 力学性能

CLC Number:

TQ316.6

ZHOU Shuai, XIN Zhong, WANG Weixia, ZHAO Shicheng, SHI Yaoqi. β-Nucleation effects induced by long chain branching polypropylene[J]. CIESC Journal, 2015, 66(9): 3788-3794.

周帅, 辛忠, 王卫霞, 赵世成, 石尧麒. 长支链聚丙烯诱导β晶成核效应[J]. 化工学报, 2015, 66(9): 3788-3794.

References 27

[1]	Stocker W, Schumacher M, Graff S, Thierry A, Wittmann J C, Lotz B. Epitaxial crystallization and AFM investigation of a frustrated polymer structure: isotactic poly (propylene), β phase [J]. Macromolecules, 1998, 31 (3): 807-814.
[2]	Yamamoto Y, Inoue Y, Onai T, Doshu C, Takahashiand H,Uehara H. Deconvolution analyses of differential scanning calorimetry profiles of β-crystallized polypropylenes with synchronized X-ray measurements [J]. Macromolecules, 2007, 40 (8): 2745-2750.
[3]	Yoshida H. Dynamic analysis of the melting behavior of polymers showing polymorphism observed by simultaneous DSC/X-ray diffraction measurements [J]. Thermochim. Acta, 1995, 267: 239-248.
[4]	Fujiwara Y. Double-melting behavior of the β-phase of isotactic polypropylene [J]. Colloid Polym. Sci., 1975, 253 (2): 273-282.
[5]	Somani R H, Hsiao B S, Nogales A, Fruitwala H, Srinivas S, Tsou A H. Structure development during shear flow induced crystallization of i-PP: in situ wide-angle X-ray diffraction study [J]. Macromolecules, 2001, 34 (17): 5902-5909.
[6]	Varga J. Characteristics of cylindritic crystallization of polypropylene [J]. Macromol. Mater. Eng., 1983, 112 (1): 191-203.
[7]	Huo H, Jiang S, An L, Feng J. Influence of shear on crystallization behavior of the β phase in isotactic polypropylene with β-nucleating agent [J]. Macromolecules, 2004, 37 (7): 2478-2483.
[8]	Zheng Q, Shangguan Y, Tong L, Peng M. Effect of vibration on crystal morphology and structure of isotactic polypropylene in nonisothermal crystallization [J]. J. Appl. Polym. Sci., 2004, 94 (5): 2187-2195.
[9]	Boucher E, Folkers J P, Creton C, Hervet H, Léger L. Enhanced adhesion between polypropylene and polyamide-6: role of interfacial nucleation of the β-crystalline form of polypropylene [J]. Macromolecules, 1997, 30 (7): 2102-2109.
[10]	Garbarczyk J, Paukszta D, Borysiak S. Polymorphism of isotactic polypropylene in presence of additives, in blends and in composites [J]. J.Macromol. Sci. B, 2002, 41 (4/5/6): 1267-1278.
[11]	Feng M, Gong F, Zhao C, Chen G, Zhang S, Yang M, Han C C. The β-crystalline form of isotactic polypropylene in blends of isotactic polypropylene and polyamide-6/clay nanocomposites [J]. J. Polym. Sci., Part B: Polym. Phys., 2004, 42 (18): 3428-3438.
[12]	Varga J, Schulek-Tóth F, Mudra I. Blends of the β-modification of polypropylene [J]. Macromol. Symp., 1994, 78 (1): 229-241.
[13]	Wang K, Zhou C. The effects of melt vibration blending on the subsequent crystallization and melting behavior of polypropylene/ultra high molecular weight polyethylene [J]. Polym. Eng. Sci., 2001, 41 (12): 2249-2258.
[14]	Phillips A, Zhu P, Edward G. Polystyrene as a versatile nucleating agent for polypropylene [J]. Polymer, 2010, 51 (7): 1599-1607.
[15]	Wang C, Chu Y, Wu Y. Electrospun isotactic polystyrene nanofibers as a novel β-nucleating agent for isotactic polypropylene [J]. Polymer, 2012, 53 (23): 5404-5412.
[16]	Zhou S, Zhao S, Xin Z. Preparation and foamability of high melt strength polypropylene based on grafting vinyl polydimethylsiloxane and styrene [J]. Polym. Eng. Sci., 2015, 55 (2): 251-259.
[17]	Zhou S, Zhao S, Xin Z, Wang W. A novel strategy for achieving high melt strength polypropylene and an investigation of its foamability [J]. J.Macromol. Sci. B, 2014, 53 (10): 1695-1714.
[18]	Zhou Shuai (周帅), Xin Zhong (辛忠), Zhao Shicheng (赵世成). Influences of shearing and cooling rate on the crystal structure of long chain branched polypropylene [J]. Petrochemical Technology (石油化工), 2013, 42 (4): 430-434.
[19]	Zhao S, Cai Z, Xin Z. A highly active novel β-nucleating agent for isotactic polypropylene [J]. Polymer, 2008, 49 (11): 2745-2754.
[20]	Jones A T, Aizlewood J M, Beckett D. Crystalline forms of isotactic polypropylene [J]. Macromol. Chem. Phys., 1964, 75 (1): 134-158.
[21]	Su Z, Dong M, Guo Z, Yu J. Study of polystyrene and acrylonitrile- styrene copolymer as special β-nucleating agents to induce the crystallization of isotactic polypropylene [J]. Macromolecules, 2007, 40 (12): 4217-4224.
[22]	Deng S, Zhao X, Huang Y, Han X, Liu H, Hu Y. Deformation and fracture of polystyrene/polypropylene blends: a simulation study [J]. Polymer, 2011, 52 (24): 5681-5694.
[23]	Liang Y, Jensen R E, Pappas D D, Palmese G R. Toughening vinyl ester networks with polypropylene meso-fibers: interface modification and composite properties [J]. Polymer, 2011, 52 (2): 510-518.
[24]	Wang J, Niu H, Dong J, Du J, Han C C. Morphology and mechanical properties of polypropylene/poly (propylene-1-octene) in-reactor alloys prepared by metallocene/Ziegler-Natta hybrid catalyst [J]. Polymer, 2012, 53 (7): 1507-1516.
[25]	Jørgensen J K, Redford K, Ommundsen E, Stori A. Molecular structure and shear rheology of long chain branched polypropylene formed by light cross-linking of a linear precursor with 1,3-benzenedisulfonyl azide [J]. J. Appl. Polym. Sci., 2007, 106 (2): 950-960.
[26]	Gotsis A, Zeevenhoven B, Tsenoglou C. Effect of long branches on the rheology of polypropylene [J]. J. Rheol., 2004, 48 (4):895-914.
[27]	Zhao W, Huang Y, Liao X, Yang Q. Molecular structure characteristics of long chain branched polypropylene and its effects on non-isothermal crystallization and mechanical properties [J]. Polymer, 2013, 54 (4): 1455-1462.

β-Nucleation effects induced by long chain branching polypropylene

长支链聚丙烯诱导β晶成核效应

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