Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Ian R Harrison"'
Autor:
Ian R. Harrison
Publikováno v:
Thermochimica Acta. 396:219-225
Using the computer and Internet to teach and train students is becoming increasingly more popular. Nevertheless, the number of faculty who take full advantage of the inherent power of the computers is limited, even in science and engineering discipli
Autor:
Ian R. Harrison, J.C Chen
Publikováno v:
Carbon. 40:25-45
This study investigates the possibility of using a post-spinning plasticization and stretching process to eliminate suspected property-limiting factors in polyacrylonitrile-based carbon fibers. This process was performed with the intention of removin
Autor:
Ian R. Harrison
Publikováno v:
Thermochimica Acta. :85-92
It’s expensive in terms of time and equipment to give students the necessary exposure to a wide variety of polymer behaviors in thermal analysis. One type of ‘Virtual Instrument’ (VI) has been developed that demonstrates the effects of changing
Autor:
Claudia A. Fonseca, Ian R. Harrison
Publikováno v:
Thermochimica Acta. 313:37-41
A number of differential scanning calorimetry (DSC) experiments were performed to investigate the melting behavior of blends of low density polyethylene (LDPE) and high density polyethylene (HDPE). Results revealed three endothermic peaks which sugge
Autor:
Ian R. Harrison, J. C. Chen
Publikováno v:
Polymer Engineering & Science. 38:371-383
Extrusion of nylon-PE films has resulted in the successful in situ formation of high aspect ratio (possibly continuous) nylon fibers as desired. However, these fibers surprisingly provide no significant reinforcement in uncompatibilized blends. While
Autor:
Claudia A. Fonseca, Ian R. Harrison
Publikováno v:
Journal of thermal analysis. 49:417-424
In a previous paper we discussed co-crystallization in a LDPE/HDPE blend using TREF and DSC. As part of that study it was observed that pure HDPE showed an unexpected fractionation behavior when quench crystallized in TREF. The overall peak broadened
Publikováno v:
Polymer Engineering & Science. 36:2708-2717
Polyethylene blends (LLDPE :HDPE 2 :1 by wt) used in NASA's balloon film applications can be effectively reinforced by addition of a small amount of liquid crystalline polymer (LCP). Cast and blown PE films containing 10% LCP show an appreciable enha
Autor:
Serop A. Karoglanian, Ian R. Harrison
Publikováno v:
Thermochimica Acta. 288:239-245
This paper demonstrates the generation of DSC thermograms from TREF chromatograms. The reverse is clearly possible, and shows that compositional distribution information is obtainable from DSC using solution crystallized material. However, TREF is es
Autor:
Serop A. Karoglanian, Ian R. Harrison
Publikováno v:
Polymer Engineering & Science. 36:731-736
The properties of ultralow-density polyethylenes (ULDPE) have been studied using temperature rising elution fractionation (TREF) as both an analytical and preparative process. TREF was employed to determine the short chain branch distribution and to
Autor:
Anunay Gupta, Ian R. Harrison
Publikováno v:
Carbon. 34:1427-1445
Oxidative stabilization studies on PAN-based copolymer fibers indicate the presence of at least two distinct reactions occurring at temperatures below 380 °C. Techniques such as thermal stress, percentage shrinkage, differential scanning calorimetry