Plexus adhesive offers high working times

Half price

Carbon composites as semiconductors

polyester?

ELECTRONIC materials

POLYESTER the price

resins

at half

of currently

avail-

is the tantaliz-

ing prospect

held out by sci-

at the University

Florida,

of

ner,

professor

and director Science

and Engineering,

has

in producing

molecular

weight

polymers

inexpensive

carbon

using

monoxide

and

low

sor of mechanical the findings team

nology having

ular weight, could conceivably

ery while

halve

changes

The ing

university

closely

producer

is work-

with

Eastman

laying

the tech-

using

offer

can

The

in

be sensed that

make

body

duce

than

could

area,

a bain

heat

Ken Wagener;

University

tel: t I -352-392-

4666

would

in which energy

of Buffalo; tel: tl-716-645 2626

Phenolics

high working times

in India

Low styrene

acrylate

adhesive

resin

based

ITW

claimed

to offer exceptional

A POLYESTER

resin

series

has low styrene

con-

regulations Italian

from

posite

Sirca

bonding

at the JEC

April.

The

isophthalic

chemical

polyester 32%

and

of high

resistance.

infoOsirca.it;

30 minute achieve

I; fax: e-mail:

internet: www.

systems.

US boat

builder

adhesive

from

benefit

and

across

a wide

range,

resistance

has

peel

environments a

to

The used

quali-

posite

roofing

even

with

tanks,

and

large

complex

minimal tion,

be

used

temperatures surface

prepara-

and is dispensed

conventional cartridge

at

using

hand-held guns

room

after

or

bulk

absence

can

can

and cladding,

and shower also

be

com-

for joining

to acrylic

Truck

and

alu-

in bathfittings.

bus assembly

benefit

from

pted

Indian

turer

Bakelite

plastics has prom-

resins

manufac-

Hylam

phenolic

Bakelite

tem

Ltd to

resins.

Hylam,

best

for its polyester

resins,

a phenolic

comprising

sys-

alternatives

for hand/spray catalyst

on

lay-up

and a mould

and

an acid release

agent. The resins are available at $1.8-2/kg. mends

Bakelite recom-

a 3-4 hr post-cure

60-80°C

for rapid

ing. Applications

at

process-

for its phe-

nolic GRP system to date are in railway,

defence

and bus

industries.

MA425. Brian

reinforced products,

has produced

to harsh

assembling

high

minium

emphasis

for fire retardance

hot press moulding,

lines

compo-

(GRP)

known

temperature

adhesive

for

in glass

good

strengths

and

the need

develop

of isocyanates.

precise,

It can

from

and

ty bond

ambient

applica-

impact

manufacturers

the

to those used by con-

tions

plus ‘open’ time,

and

applies

an ‘icing bag’

com-

is a twowhich

One

fectioners.

stringers.

MA425 adhesive

nents. Sirca SPA;

tel: +39-49-9322-31 +39-49-5797-262;

part

mix

similar

applica-

to hulls

in hull

enabling

resins

content

Ugo Pelosin,

sirca. it

in

unsaturated

styrene

around

show

is

in structural

joining

decks

Plexus

duced

UK-

Plexus

marine

include

specialist

SL series was intro-

from

meter

Construction

Typical tions

emission

times

meth-

applications.

is available

resins

SPA. The

have

new

ADVANCED

working

and can help moulder’s with

be

E&s GoUbaum, Univevsity

INCREASING

tent

not

problem.

Plexus adhesive offers AN

comply

dissipa-

Tennessee,

on the development.

which

capability over a large

of conventional

electronics,

solar-

store

electronics.

electrical

material

con-

to pro-

conventional

be spread

tion,

vehicles

the authors

would

electrical

reinforced semiconduc-

be cheaper

could

energy-storing

panels

tor could,

Because

components,

powered

the

ftbre

(CFRl?)

fibre laybe

and

in San Diego.

Carbon plastics

Symposium

Structures

silicon-based

technology

possible

aircraft

material

Observing

enabling

first outlined

in a paper give at

Smart

inserting

energy to be stored.

on how

the structural

and

colleague

Wang,

cluded,

using the fibres between

formed focusing

and contacts

ers, large capacitors

the discov-

of

the composite.

Furthermore,

Shoukai

on

leader.

with

the research

char-

a system

leads

research

Chung,

Materials

the researchers

is that metal

insulators

electronic

advan-

that

‘chipless’ computers,

the

an International

(conductThe

as conductors

materials

to junc-

and

material

Chemical

Co in Kingsport,

of Florida;

and metallic

acteristics

in temperature

itself.

polyester

tions)

revolutionize

made

composites

tured polyesters.

been

electrical

inherent

Chung

of manufac-

of the fibre

conclude,

of structural

capabilities.

the cost

the plane

says that

for a new

says

in one

from sunlight,

smart

embody

com-

and aero-

even

composite

(perpendicular

tage of this,

generated

discovered

is semiconducting

already within

structures,

adapted

be successfully

for polymers

she further

that unidirectional

of her research

could

of the

with temper-

direction

profes-

engineering,

of higher molec-

could

Chung,

foundation

if it

have

change

ing) in another.

‘smart’

ethylene

oxide gases. The method,

material

space

molecular

succeeded

in carbon

Deborah

of the university’s

for Macro

the first

made.

of chemistry

Center

of

of semiconduc-

tor behaviour posite

USA.

A team led by Ken Wage-

ature,

to a materials

USA, where

observations

properties

material

possi-

at the University

Buffalo,

able products entists

bility according specialist

electrical

structural

are a strong

Smith,

ITW

P&us; tel: t 44-1625423522.

Bakelite Hyhm; fzx: +9140-840890.

Reinforced

Plastics May 1998