H.A. Williams Replies

Williams, Hannah

doi:10.1177/0040571x7607900407

Cited by 2 publications

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“…Today, three methods for crosslinking polyethylene are commercially used: peroxide crosslinking, irradiation crosslinking, and silane crosslinking. Among these methods, silane crosslinking of LDPE is extensively used because of easy processing, low material cost, low capital investment requirements, and the favorable properties of the final processed materials [4][5][6][7]. Because polyethylene has no functional groups to provide crosslinking, an initiator such as dialkyl peroxide is extensively used.…”

Section: Introductionmentioning

confidence: 99%

Silane grafting and moisture crosslinking of polyethylene: The effect of molecular structure

Azizi

Morshedian

Barikani

2009

Vinyl Additive Technology

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The silane grafting and moisture crosslinking of different grades of polyethylene have been investigated. Three types of polyethylene (HDPE, LLDPE, and LDPE) with different molecular structures and similar melt flow indices were selected. The initiator was dicumyl peroxide (DCP), and the silane was vinyltrimethoxysilane. The grafting reaction was carried out in an internal mixer. The extent of grafting and the degree of crosslinking were determined, and hot-set tests were carried out to evaluate the crosslink structure of the different polyethylenes. The LLDPE had the highest degree of grafting, while the LDPE had the least. The rate of crosslinking for LDPE was higher than that of HDPE and LLDPE. The gel content of LDPE was higher than that of HDPE and LLDPE. Hot-set elongation and the number-average molecular weight between crosslinks (M c ) were lower for LLDPE and LDPE than for HDPE. Increasing the silane/DCP percentage led to peroxide crosslinking, thereby decreasing the M c and hot-set elongation. The number-average molecular weight (M n ), molecular weight distribution, and number of chain branches were the most important parameters affecting the silane grafting and moisture crosslinking.

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Section: Introductionmentioning

confidence: 99%

Silane grafting and moisture crosslinking of polyethylene: The effect of molecular structure

Azizi

Morshedian

Barikani

2009

Vinyl Additive Technology

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Magistrats et gens de bien

Tavaglione

2005

philoso

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I shall offer here a “dilemmatic” argument for liberal antipaternalism. Either it is the case – as Kantians maintain – that impersonal, impartial and universal rules enjoy ethical priority ; or it is the case – as Communitarians like MacIntyre maintain – that universal rules do not enjoy any such priority. If Kantians are right, then – as suggested by the conventional wisdom of textbooks in political philosophy – State-neutrality towards conceptions of the good is justified. And if Communitarians are right, then – surprisingly – State-neutrality is justified too. Therefore State-neutrality is justified. The first premiss is tautological, and needs no special study. The second premiss, linking the priority of universal rules to State-neutrality, is too well known to deserve our attention. But the third premiss, linking the non-priority of universal rules to State-neutrality, sounds like a paradox. The paper thus focuses on that third controversial premiss

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H.A. Williams Replies

Cited by 2 publications

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Silane grafting and moisture crosslinking of polyethylene: The effect of molecular structure

Silane grafting and moisture crosslinking of polyethylene: The effect of molecular structure

Magistrats et gens de bien

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