Effect of Field Synergy on Heat and Mass Transfer Performance of PP/PS Composite System

doi:10.19491/j.issn.1001-9278.2020.05.009

Abstract

Abstract:

In terms of the conservation equations of momentum and energy, the synergy effect from the velocity and temperature fields was proposed as an important influence factor on the flow and heat transfer of polymer. A novel torsion screw configuration and field synergy screw were designed, and the heat and mass transfer properties of conventional screw and field synergy screw were studied through extrusion experiments for the polypropylene/polystyrene compo?sites. The results indicated that the field synergy screws with a torsion screw configuration had a smaller average particle size, a larger particle size distribution density and a longer average residence time compared to the conventional screw. This can improve the mixing capability of the extruder. The field synergy screws had a larger convection heat transfer coefficient and a smaller radial temperature difference, which improved the heat transfer ability of the extruder.

Key words: field synergy, heat and mass transfer, torsion screw configuration, mixing capability, heat transfer capability

CLC Number:

TQ325.1

Ranran JIAN, Zhonghe SHI, Yumei DING, Weimin YANG. Effect of Field Synergy on Heat and Mass Transfer Performance of PP/PS Composite System[J]. China Plastics, 2020, 34(5): 52-58.

Figures/Tables 7

Fig.1. Elongational flow and shear flow

Fig.2. Physical model of the torsion element

Fig.3. Extruder and screw of extruder with multi parameter on?line monitoring

Fig.4. Particle size distribution of dispersed phases of filament samples

Fig.5. Residence time distribution of the screws

Fig.6. Convective heat transfer coefficient for various screws

Fig.7. Radial temperature distribution at the extrusion die

References 17

1	SABERI A, BAKHSHESHI H R, KARAMIAN, et al. Magnesium⁃Graphene Nano⁃Platelet Composites: Corrosion Behavior, Mechanical and Biological Properties [J]. Journal of Alloys and Compounds, 2020, 821: 153 379.
2	胡建鹏, 邢东, 郭明辉. 植物纤维增强聚乳酸可生物降解复合材料研究动态 [J]. 西南林业大学学报(自然科学), 2020, 39(6): 1⁃9.
	HU J P, XING D, GUO M H. Research Progress and Prospect in Plant Fiber Reinforced Polylactide Acid Biodegradable Composites [J].Journal of Southwest Forestry University(Natural Science), 2020, 39(6): 1⁃9.
3	黄苏萍, 周科朝. HA/HDPE多尺度生物复合材料的制备与力学性能 [J]. 高分子材料科学与工程, 2010, 26(11): 147⁃150.
	HUANG S P, ZHOU K C. Preparation and Mechanical Properties of HA/HDPE Composite with Multi⁃Scale Structure [J]. Polymer Materials Science & Engineering, 2010, 26(11): 147⁃150.
4	李新功, 吴义强, 郑霞. 生物可降解竹纤维增强塑料复合材料成型工艺 [J]. 世界竹藤通讯, 2009, 7(4): 22⁃26.
	LI X G, WU Y Q, ZHENG X. Forming Technology of Bamboo Fiber Reinforced Biodegradable Plastic Compo⁃sites [J]. World Bamboo and Rattan, 2009, 7(4): 22⁃26.
5	任宇飞, 孙瑞洲, 轩朝阳, 等. PET/SiO₂纳米复合材料的研究进展 [J]. 化工新型材料, 2019, 47(10): 11⁃14.
	REN Y F, SUN R Z, XUAN C Y, et al. Research Pro⁃gress of PET / SiO₂ Nanocomposites [J]. New Chemical Materials, 2019, 47(10): 11⁃14.
6	许孔力, 许学伟, 李丽英, 等. 碳纳米管/聚合物纳米复合材料研究进展 [J]. 首都师范大学学报(自然科学版), 2019, 40(5): 84⁃88.
	XU K L, XU X W, LI L Y, et al. Research Progress on Carbon Nanotube/Polymer Nanocomposites [J]. Journal of Capital Normal University(Natural Science), 2019, 40(5): 84⁃88.
7	SIKORA J W, SAMUJLO B. Investigation of the Poly(vinyl chloride) Extrusion Process Using a Feed Throat with a Feed Pocket [J]. Polymer Engineering & Science, 2014, 54(9): 2 037⁃2 045.
8	杜遥雪, 石绍伟, 殷小春, 等. 3种混炼单元加工聚合物混合性能的模拟对比 [J]. 高分子材料科学与工程, 2016, 32(6): 101⁃106.
	DU Y X, SHI S W, YIN X C, et al. Comparison of Polymer Mixing Properties Processed by Three Kinds of Blending Unit [J]. Polymer Materials Science & Engineering, 2016, 32(6): 101⁃106.
9	李晓翠, 彭炯, 陈晋南. 销钉单螺杆混炼段分布混合性能的数值研究 [J]. 中国塑料, 2010, 24(2): 109⁃112.
	LI X C, PENG J, CHEN J N. Numerical Study on Distributive Mixing Performance of Mixing Section of Pin Single⁃Screw Extruders [J]. China Plastics, 2010, 24(2): 109⁃112.
10	HOPMANN C, FISCHER T. New Plasticising Process for Increased Precision and Reduced Residence Times in Injection Moulding of Micro Parts [J]. CIRP Journal of Manufacturing Science and Technology, 2015, 9: 51⁃56.
11	POTENTE H, TOBBEN W H. Improved Design of Shearing Sections with New Calculation Models Based on 3D Finite⁃Element Simulations [J]. Macromol Mater Eng, 2002, 287(11): 808⁃814.
12	鉴冉冉, 谢鹏程, 杨卫民. 聚合物螺杆塑化过程传热特性研究进展 [J]. 塑料, 2016, 45(4): 69⁃72.
	JIAN R R, XIE P C, YANG W M. Research Development on Heat Transfer Characteristics of the Polymer Screw Plasticizing Process [J]. Plastics, 2016, 45(4): 69⁃72.
13	金日光，马秀清. 高聚物流变学 [M]. 上海: 华东理工大学出版社, 2012: 88⁃102.
14	JIAN R R, YANG W M, CHENG L S, et al. Numerical Analysis of Enhanced Heat Transfer by Incorporating Torsion Elements in the Homogenizing Section of Polymer Plasticization with the Field Synergy Principle [J]. International Journal of Heat and Mass Transfer, 2017, 115: 946⁃953.
15	JIAN R R, YANG W M, XIE P C, et al. Enhancing A Multi⁃Field⁃Synergy Process for Polymer Composite Plasticization: A Novel Design Concept for Screw to Facilitate Phase⁃to⁃Phase Thermal and Molecular Mobility [J]. Applied Thermal Engineering, 2020, 164: 114 448.
16	JIAN R R, YANG W M, CHENG L S, et al. Numerical Simulation on the Enhanced Mixing of Polymer Melt by Single Screw with Torsion Elements in the Homogenizing Section [J]. Polym⁃Korea, 2018, 42(6): 910⁃918.
17	张伟. 同向三螺杆挤出机的混炼性能评价 [D]. 北京: 北京化工大学, 2011.

[1]	YU Changyong, XIN Zhong. Effect of α/β complex nucleating agent based on hexahydrophthalate on properties of polypropylene [J]. China Plastics, 2022, 36(7): 121-128.
[2]	LIU Yi, SUN Wei, QU Guoxing, WANG Ye, YUAN Ning, YANG Shaolin, XU Xia, CHANG Xiaoyi, ZHANG Yufei. Structure and performance analysis of transparent polypropylene special material for thin⁃wall injection molding [J]. China Plastics, 2022, 36(7): 37-43.
[3]	WU Xiongjie, ZHU Dongbo, SUN Jiangbo, GAO Longmei, CHU Yu, CHENG Jinsong, XIE Aidi. Study on application performance of polyethylene/CaSO₄ nanoparticle composite flexible packaging [J]. China Plastics, 2022, 36(6): 10-15.
[4]	LEI Yujie, CHEN Minghuan, WANG Jieyao, CHEN Wangzhi, LI Lei. Cross⁃linked foaming process and performance of recycled polyethylene [J]. China Plastics, 2022, 36(6): 124-129.
[5]	ZHANG Wencai, HAO Xiaogang, LI Ping, LIN Hao, PEI Qiang, FENG Gongji, FU Zhaohua, YU Xiaofang. Effect of maleic⁃anhydride⁃grafted polyethylene content on performance of recycled polyethylene⁃modified asphalt [J]. China Plastics, 2022, 36(6): 24-31.
[6]	SUN Wei, LIU Yi, LIAO Yunlong, CHEN Junjia. Study on influence factors for determination of ethylene content in polypropylene powder [J]. China Plastics, 2022, 36(6): 54-59.
[7]	LI Jie, XU Ran, REN Feng, YANG Yifei, XIN Chunling, HE Yadong. Fiber fracture of continuous glass fiber⁃reinforced polypropylene prepreg tapes during melt impregnation [J]. China Plastics, 2022, 36(6): 69-76.
[8]	ZHU Jingyun, YI Huijun, YAN Wei, LI Dawei. Research and development of polyethylene special materials for compound films [J]. China Plastics, 2022, 36(6): 77-80.
[9]	XIA Yunxia, LI Lei, LUO Zhangsheng, ZHU Qianqin, HE Lijun. Preparation and properties of recycled polyethylene non⁃woven fabrics based on flash evaporation [J]. China Plastics, 2022, 36(5): 14-18.
[10]	WANG Ke, LONG Chunguang. Mechanical and tribological properties of ultra⁃high molecular weight polyethylene/sepiolite fiber composites [J]. China Plastics, 2022, 36(5): 19-23.
[11]	LIU Chuan, XU Miaojun, WANG Jingchun, LI Bin. Effect of expandable graphite on flame retardant performance of vinyl silicone rubber [J]. China Plastics, 2022, 36(4): 15-18.
[12]	WANG Qingsong. Development of glass⁃fiber⁃reinforced polypropylene with high strength and low VOC [J]. China Plastics, 2022, 36(4): 30-34.
[13]	LIU Guangyuan, ZHAI Qianchao, WANG Fengwu, WANG Yihui, ZHENG Debao, CHEN Xiangying, ZHANG Zhongjie. Preparation and performance of PE⁃HD compatibilizer and adhesive resin through binary monomer grafting [J]. China Plastics, 2022, 36(4): 35-42.
[14]	WEN Yuan, MAO Xianpeng, XU Kejie. Effect of sample thickness on tensile properties of polyethylene [J]. China Plastics, 2022, 36(4): 43-46.
[15]	XU Rongxia, WEI Gang, WEI Lilan, WU Jiecui, JIANG Yujiang. Friction and wear properties of PE⁃UHMW modified with nano⁃SiO₂ and PA6 [J]. China Plastics, 2022, 36(4): 47-52.