Toughness mechanism in semi-crystalline polymer blends: I. High-density polyethylene toughened with rubbers

Bartczak, Z.; Argon, A. S.; Cohen, Robert E.; Weinberg, Mark

doi:10.1016/s0032-3861(98)00445-5

Cited by 275 publications

(212 citation statements)

References 32 publications

Supporting

Mentioning

189

Contrasting

Unclassified

Order By: Relevance

“…With increasing volume fraction of the inclusions that have a wide size distribution, the interparticle distance decreases and the interphase surrounding the inclusions interconnects. [22,36,37] In the early stages, partial interconnection of the interphase leads to the formation of domains that percolate above a certain filler concentration. With increasing thickness of the interphase, the interconnection is reached at lower f. The sum of these effects leads to the observed exponential increase in the modulus of C18 (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Surfactant Chain Length and Tensile Properties of Calcium Carbonate‐Polyethylene Composites

Osman

Atallah

2007

Macro Chemistry & Physics

View full text Add to dashboard Cite

Micron‐sized CaCO3 particles free of milling additives were coated with a monolayer of aliphatic carboxylic acids of different chain length (C2, C4, C5, C10, and C18). CaCO3 was compounded with LDPE at different loading, and the tensile properties of the composites were measured and correlated to the length of the alkyl chains tethered to the particles' surface. SEM indicated that the particles are well dispersed (no agglomerates). The inclusions show little influence on the polymer crystallization, and the filler surface treatment leads to a slight decrease in polymer crystallinity that grows with increasing chain length of the fatty acid. The tensile modulus, yield stress, and maximum stress increase with increasing filler volume fraction ϕ, and the dependence is a function of the length of the alkyl chains tethered to the CaCO3 surface. It seems that the interphase thickness and properties depend on the alkyl chain length and strongly influence the modulus and stresses measured. With increasing chain length in the coated organic layer, the interfacial adhesion between the inclusions and the polymer matrix decreases, and the fibril formation increases. The tensile properties are the result of a superimposition of all these effects. The yield and ultimate strains are dominated by the interfacial slippage (increases with growing alkyl chain length) that leads to debonding at high deformations. Surface treatment of CaCO3 with valeric acid leads to the maximum possible tensile modulus, yield stress, and tensile strength combined with a relatively small loss in yield and ultimate strain.magnified image

show abstract

Section: Resultsmentioning

confidence: 99%

Surfactant Chain Length and Tensile Properties of Calcium Carbonate‐Polyethylene Composites

Osman

Atallah

2007

Macro Chemistry & Physics

View full text Add to dashboard Cite

show abstract

“…Consequently, they can not deal with the absolute length scale dependence found in experiments, like the critical ligament thickness for semicrystalline (1,2,3,4,5,6) and amorphous (30,31,32,46) polymers. In the first, the influence of trans-crystallinity, yielding orientation of the crystallization and, subsequently, anisotropy of the crystal properties (locally decreasing the yield stress) is fully explored.…”

Section: Validationmentioning

confidence: 99%

“…Generally heterogeneity is introduced by creating a second dispersed phase. Although for semi-crystalline polymers even hard inclusions proved to be effective, provided that their mutual distance was below a critical value such that the anisotropic crystal orientations could be exploited (1,2,3,4,5,6), in amorphous polymers up to now only rubbers proved to be successful. Introducing a rubbery phase has a drawback -modulus and yield strength decrease.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Level Finite Element Method for Modeling Rubber-Toughened Amorphous Polymers

Meijer

Govaert

Smit

2000

Toughening of Plastics

View full text Add to dashboard Cite

“…Tal propriedade é significativamente melhorada pela incorporação de partículas (micro-e nano-) a uma matriz polimé-rica, já que estas partículas possuem rigidez muito maior do que a matriz plástica [20].…”

Section: Análise Pead Puro Versus Compósitos Pead/caco3unclassified

Aplicação de um planejamento fatorial para a avaliação das propriedades mecânicas, térmicas, morfológicas e de escoamento de compósitos à base de PEAD e CaCO3

et al. 2013

View full text Add to dashboard Cite

RESUMOAtualmente, compósitos à base de polímero/carga mineral têm sido alvo de grande interesse, tanto em indús-trias quanto em pesquisas acadêmicas, devido à melhora significativa nas propriedades dos materiais quando comparadas ao polímero virgem. O carbonato de cálcio (CaCO 3) é um dos materiais mais abundantes do planeta e tem sido geralmente usado na obtenção de compósitos poliméricos. As propriedades de suas partículas (tamanho, forma e módulo) podem provocar um efeito significativo, especialmente no comportamento mecâ-nico. As misturas PEAD/CaCO 3 são amplamente usadas na indústria automotiva. No presente estudo, o efeito da incorporação de CaCO 3 nas propriedades mecânicas e de escoamento destas misturas foi avaliado através de um planejamento fatorial simples de dois níveis, do tipo 2 n , com n = 3 fatores: teor de carga; tamanho de partícula e velocidade de rotação da rosca. As variáveis de resposta analisadas foram: módulo de Young e resistência ao impacto e índice de fluidez (MFI). Os resultados mostraram que, dentro dos níveis estabelecidos, o fator que apresentou mais impacto nas variáveis de resposta foi o teor de carga mineral.Palavras chaves: PEAD, CaCO 3 , mistura de PEAD/CaCO 3 , caracterização. ABSTRACTIn recent years, polymer/mineral filler composites have attracted great interest, both in industries and academic researches, because they often show a remarkable improvement of materials properties when com-

show abstract

Toughness mechanism in semi-crystalline polymer blends: I. High-density polyethylene toughened with rubbers

Cited by 275 publications

References 32 publications

Surfactant Chain Length and Tensile Properties of Calcium Carbonate‐Polyethylene Composites

Surfactant Chain Length and Tensile Properties of Calcium Carbonate‐Polyethylene Composites

A Multi-Level Finite Element Method for Modeling Rubber-Toughened Amorphous Polymers

Aplicação de um planejamento fatorial para a avaliação das propriedades mecânicas, térmicas, morfológicas e de escoamento de compósitos à base de PEAD e CaCO3

Contact Info

Product

Resources

About