Structure and Mechanical Properties of PP/GF Composite Films Prepared by Hot Pressing Molding

doi:10.19491/j.issn.1001-9278.2021.04.008

Abstract

Abstract:

PP/GF composite films were prepared with the acidcorroded glass fiber （GF） net introduced into polypropy-lene （PP） matrix by a hot-pressing molding technique. Their crystalline structure， thermal behavior， interfacial morpho-logy and mechanical properties were characterized using scanning electron microscope， wide-angle X-ray diffraction， differential scanning calorimeter and universal material testing machine. The effect of GF content on the microstructure and mechanical properties was emphatically discussed. The results indicated that there were many grooves developed on the surface of GF after being etched with acid， leading to an increase in surface roughness. This is helpful to improve the interfacial adhesion between GF and PP. The nucleation points were increased with the addition of acid-treated GF， resul-ting in an increase in crystallinity. The mechanical properties of the PP/GF films at a low content of GF were improved significantly compared to pure PP samples， and their tensile strength and toughness increased by 33.75 % and 41.15 % at a GF content of 0.2 wt%， respectively. In addition， the tensile strength and toughness tended to decrease with an increase in the GF content.

Key words: polypropylene, acid-corrodision, glass fiber net, hot pressing molding

CLC Number:

TQ 325.1⁺4

MA Zhongyun, DING Lili, FU Wei. Structure and Mechanical Properties of PP/GF Composite Films Prepared by Hot Pressing Molding[J]. China Plastics, 2021, 35(4): 42-46.

Figures/Tables 7

References 15

1	鲁雄，杨旭静，段书用，等. GF增强聚丙烯复合材料的应变率敏感特性［J］. 材料工程， 2018， 46（4）： 146⁃151.
	LU X，YANG X J，DUAN S Y， et al. Strain Rate Sensitive Properties of Glass Fiber Reinforced Polypropylens Composites ［J］. Journal of Materials Engineering， 2018， 46（4）： 146⁃151.
2	张晓明，刘雄亚. 纤维增强热塑性复合材料及其应用［M］．北京：化学工业出版社， 2007.
3	刘国刚，马伊，梁文斌，等. 长GF增强聚丙烯复合材料性能研究［J］. 塑料科技， 2017， 45（10）： 25⁃29.
	LIU G， Ma Y， LIANG W， et al. Study on Properties of Long Glass Fiber Reinforced Polypropylene Composites ［J］. Plastics Science and Technology， 2017， 45（10）： 25⁃29.
4	严文聪，曾金芳，王斌. 纤维混杂复合材料研究进展［J］. 化工新型材料， 2011， 39（6）： 30⁃33.
	YAN W C， ZENG J F， WANG B. The Progress in Fibers Hybrid Composites ［J］. New Chemical Materials， 2011， 39（6）： 30⁃33.
5	WANG K， GUO M， ZHAO D， et al. Facilitating Transcrystallization of Polypropylene/Glass Fiber Composites by Imposed Shear during Injection Molding ［J］. Polymer， 2006， 47（25）： 8 374⁃8 379.
6	谢满存. 酸刻蚀玻璃纤维等规聚丙烯复合材料界面ß横晶的研究［D］. 郑州：郑州大学， 2013.
7	陈锐彬，沈旭渠，刘俊，等. 相容剂的添加量对GF增强聚丙烯性能的影响［J］. 广东化工， 2018， 45（22）： 29⁃30.
	CHEN R B， SHEN X Q， LIU J， et al. Effect of the Content of Compatibilizer on Properties of Glass⁃fiber Reinforced Polypropylene ［J］. Guangdong Chemical Industry， 2018， 45（22）： 29⁃30.
8	靳宇，信春玲，何亚东，等. 纳米二氧化硅修饰GF表面对GF增强聚丙烯复合材料性能的影响［J］. 北京化工大学学报（自然科学版）， 2020， 47（2）： 36⁃43.
	JIU Y， XIN C L， HE Y D， et al. The Effect of Nano⁃silica Modified Glass Fiber on the Properties of Glass Fiber Reinforced Polypropylene Composites ［J］. Journal of Beijing University of Chemical Technology （Natural Science）， 2020， 47（2）： 36⁃43．
9	倪卓，张丽兴，刘啸天，等.SEBS/PP共混材料中PP结晶行为［J］. 塑料， 2020， 49（4）： 141⁃145.
	NI Z， ZHANG L X， LIU X T， et al. Crystallization Behavior of PP in SEBS/PP Blends ［J］. Plastics， 2020， 49（4）： 141⁃145.
10	WANG P， ZOU B， DING S L， et al. Preparation of Short CF/GF Reinforced PEEK Composite Filaments and Their Comprehensive Properties Evaluation for FDM⁃3D Printing ［J］. Composites Part B， 2020， 198， 108175.
11	SHI S Y， WANG L Y， PAN Y M， et al. Remarkably Strengthened Microinjection Molded Linear Low⁃Density Polyethylene （LLDPE） via Multi⁃walled Carbon Nanotubes Derived Nanohybrid Shish⁃kebab Structure ［J］. Composites Part B， 2019，167： 362⁃369.
12	ZHANG Y F， LIN X F， HU H. Combined Effect of Chemically Compound Graphene Oxide⁃Calcium Pimelate on Crystallization Behavior， Morphology and Mechanical Properties of Isotactic Polypropylene ［J］. Polymers for Advanced Technologies， 2020， 31（10）： 2 301⁃2 311.
13	SLOBODIAN P， RIHA P， SAHA P. A Highly⁃deformable Composite Composed of an Entangled Network of Electrically Conductive Carbon⁃nanotubes Embedded in Elastic Polyurethane ［J］. Carbon， 2012， 50： 3 446⁃3 453.
14	吉华建，马玉录，谢林生，等.退火热处理对iPP片材固相拉伸强化效果的影响［J］.中国塑料， 2020， 34（2）： 9⁃15.
	JI H J，MA Y L，XIE L S， et al. Influence of Annealing Heat Treatment on Solid⁃state Tensile Strengthening Effect of iPP Sheets ［J］. China Plastics， 2020， 34（2）： 9⁃15.
15	FELDMAN A， GONZALEZ M F， MAROM G. Transcrystallinity in Surface Modified Aramid Fiber Reinforced Nylon 66 Composites ［J］. Macromolecular Materials and Engineering， 2003， 288（11）： 861⁃866.

样品	弹性模量/MPa	拉伸强度/MPa	断裂韧性/MJ·m^-3
PP	306.23	25.01	4.69
0.2%? PP/GF	333.53	33.45	6.62
0.6%? PP/GF	367.29	31.80	4.75
1%? PP/GF	432.64	28.77	3.22
3%? PP/GF	635.27	26.67	3.19

样品	弹性模量/MPa	拉伸强度/MPa	断裂韧性/MJ·m^-3
PP	306.23	25.01	4.69
0.2%? PP/GF	333.53	33.45	6.62
0.6%? PP/GF	367.29	31.80	4.75
1%? PP/GF	432.64	28.77	3.22
3%? PP/GF	635.27	26.67	3.19

样品	熔点/℃	结晶温度/℃	熔融焓/J·g^-1	结晶度/%
PP	169.84	122.29	94	44.97
0.2%?PP/GF	169.76	122.31	108	51.67
0.6%?PP/GF	168.81	122.72	111	53.11
1%?PP/GF	168.41	122.87	120	57.41
3%?PP/GF	168.27	123.56	127	60.77

样品	熔点/℃	结晶温度/℃	熔融焓/J·g^-1	结晶度/%
PP	169.84	122.29	94	44.97
0.2%?PP/GF	169.76	122.31	108	51.67
0.6%?PP/GF	168.81	122.72	111	53.11
1%?PP/GF	168.41	122.87	120	57.41
3%?PP/GF	168.27	123.56	127	60.77

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